Best AI SDR and Sales Outreach Agents in 2026

Who Wins for What

You want an agent that finds prospects, writes outreach and books meetings, but the market is full of overlapping claims and pricing pages that hide the numbers. Here is the short version. Artisan and 11x are the most autonomous options, and 11x is the only one of the two that publishes a price. Apollo, RegieGO and Unify are the cheapest ways to start, each with a free tier. Clay is the research and enrichment engine, Amplemarket Duo and Unify suit signal-based selling with rep approval, Instantly is the pick for email volume, and HubSpot and Outreach make sense if your team already runs on them.

Almost every performance number in this market comes from the vendor. We label those numbers as vendor-reported, date-stamp every price as of Nov 11, 2026, and say plainly when a price is not public. This is not legal advice, and the compliance section is a starting point for a conversation with counsel.

Artisan's own overview of Ava, the autonomous AI BDR. It is vendor material, so read it as a product pitch.

Quick Picks

Master Comparison Table

Prices below come from each vendor's pricing page as fetched on Nov 11, 2026 unless marked otherwise. Pricing pages change often, and several of them show different figures in different sections, which we note.

None of these tools is open source. If you want to build your own outbound agent from open components, the best AI coding agents and the best MCP servers for Claude Code are the better starting point.

What an AI SDR Actually Does

A human sales development rep does five jobs: choose who to contact, research each person, write the message, send it across channels and handle replies until a meeting is booked. An AI SDR automates some or all of those. The tools in this list sit at different points on that spectrum.

• Data and research layer: Clay, Apollo and the data side of Amplemarket and Unify.
• Autonomous agent layer: Artisan Ava, 11x Alice, AiSDR Ami and Unify's agent.
• Copilot layer: Amplemarket Duo, RegieGO and HubSpot, where a rep reviews drafts.
• Sending infrastructure layer: Instantly, plus the managed mailboxes bundled by 11x and Unify.
• Platform layer: Outreach and HubSpot, where agents live inside an existing system of record.

Knowing which layer you are missing narrows the choice fast. A team with a good list and no time to write needs a copilot. A team with no list needs data first. A team that already sends well but cannot research accounts needs Claygent-style enrichment. If your plan includes phone calls, also read our guide to browser infrastructure for AI agents for the kind of automation that powers research agents, and the sibling roundup on voice AI agent platforms.

11x (Alice)

11x sells two agents. Alice is the outbound SDR, and Julian handles inbound voice and chat. The pricing page says Alice outbound covers email and social with multichannel sequences, and also lists consented outbound calling. Julian is sold separately and priced by calls and chats per month.

What sets 11x apart in this group is how much it publishes. The Alice Growth tier starts at $3,750 per month billed annually, with up to 5 users and 2,000 new prospects per month. Pro is custom quoted, with up to 10 users, 5,000 prospects per month and 105+ languages. Enterprise is custom, with unlimited users, 10,000+ prospects per month, API access, SSO and a custom DPA and SLA. The page states that 11x charges per lead rather than per send, so adding touchpoints does not raise the bill.

Every tier includes 11x-managed Gmail mailboxes with domain setup, warmup, inbox rotation and monitoring, plus bi-directional CRM sync. 11x says onboarding has no setup fee and that Outbound is live after two weeks of standard onboarding. That is a vendor statement, not a measured result.

Pricing: As of Nov 11, 2026: Alice Growth from $3,750/mo (annual billing), Pro and Enterprise by quote. A pricing page figure of from $36,000 per year matches that monthly rate. Julian Voice starts from $5,333/mo and Julian Chat from $2,417/mo according to the 11x help center.

Strengths

• Published entry price and per-tier volume limits make budgeting possible before a sales call.
• Managed mailbox infrastructure is bundled, so you do not buy a separate warmup tool.
• Pro and above add multi-language outreach across 105+ languages, which matters for EMEA and LATAM outbound.
• Bi-directional CRM sync is listed on all tiers.

Weaknesses

• The cheapest tier is an annual commitment of $36,000, which is out of reach for a small team.
• Pro and Enterprise pricing is quote-only, and the feature table does not clearly show which tier has which feature.
• Public sources disagree on how channels split between Alice and Julian, so confirm in a demo which agent handles phone and SMS for your use case.

Best for: Funded teams that want an autonomous outbound agent with managed infrastructure and are comfortable with an annual contract.

Artisan (Ava)

Artisan positions Ava as an autonomous AI BDR. Its own product copy says Ava runs outbound end to end: lead discovery, enrichment, campaign creation, autonomous replies and scheduling. The vendor says it consolidates the outbound stack into one platform covering B2B data, enrichment, deliverability, sequencing, a dialer and intent signals.

Control features are described as human-in-the-loop: approvals, tone and CTA locks, and escalation rules. Outreach is sent from your own domains in your reps' names. The page also describes CRM reactivation, which re-engages stale or closed-lost pipeline with automated campaigns.

Artisan describes a database of 250M+ verified contacts. Treat that as a vendor claim. The fetched pages show no performance results and no dollar prices; the pricing page only says plans are credit-based and scoped to lead volume, mailboxes and dialer seats.

Pricing: Not public as of Nov 11, 2026. The pricing page describes credit-based tiers from startup to enterprise and gives no amounts. Third-party pricing articles exist but were not used here.

Strengths

• One product replaces data, enrichment, sequencing and a dialer, which reduces vendor sprawl.
• Approval gates and tone and CTA locks give managers a way to constrain what the agent says.
• Closed-lost CRM reactivation is a practical use case that does not require new prospecting.

Weaknesses

• No public prices, so you cannot compare cost before a sales conversation.
• The channel list on the fetched page is email-centric; confirm LinkedIn and phone coverage in a demo.
• No independent performance data and no vendor numbers on the pages we fetched.

Best for: Teams that want to hand outbound to one agent and are willing to negotiate pricing.

Clay (Claygent)

Clay is a data and workflow tool first. You build tables of accounts and contacts, run waterfalls across multiple data providers, and call Claygent, Clay's AI research agent, to fetch what the providers do not have. Clay describes Claygents as agents that take inputs, follow your instructions and return structured output. General-purpose Claygents run in Tables and Workflows; Account Agents run across every account in an Audience or Workflow segment and are in beta on Enterprise, Growth and Launch plans.

Claygent has web access for last-mile research, such as reading a competitor homepage or pulling firmographic context. Pricing is in two parts, data credits and actions. Each AI prompt costs one action, and the page says charges follow the complexity and token usage of the request. General-purpose Claygents are stateless and one-shot, while Account Agents keep persistent memory.

Clay is not a drop-in SDR. The Launch plan adds email sending through Clay or integrations, and Growth adds the Clay Sequencer and CRM auto-sync, but most teams pair Clay with a sender such as Instantly or a sequencer in their CRM.

Pricing: As of Nov 11, 2026 the fetched pricing section lists Free ($0; 500 actions and 100 data credits per month; up to 200 rows per table), Launch ($167/mo headline; from 15K actions and 3K data credits), Growth ($446/mo headline; from 40K actions and 6K data credits) and Enterprise (custom). The page's own FAQ gives different starting prices of $185 for Launch and $495 for Growth, so verify at checkout.

Strengths

• Waterfall enrichment across providers raises coverage of emails and phone numbers beyond any single database.
• Claygent handles research questions no provider field answers, such as what a company announced last month.
• A real free plan, with the Claygent builder available on all tiers.

Weaknesses

• Credit and action pricing takes modeling; heavy Claygent use on large lists can cost more than a seat-based tool.
• It is a build-it-yourself platform, so someone on the team must own the tables and prompts.
• The pricing page lists two sets of prices for the same plans.

Best for: RevOps-minded teams that want custom research and enrichment and already have a sending tool.

Apollo AI

Apollo started as a contact database with sequencing and has added agents on top. Its homepage describes automatic prospecting from goal to booked meeting, where agents research, build lists, write outreach, follow up and book meetings, and mentions an AI Context Center for training agents on your ICP and product. It reports 240M+ contacts and 30M+ accounts and says over 600,000 companies use it.

The pricing page we fetched describes four tiers: Free, Basic, Professional and Custom. It says credits are pooled across the team, granted each billing cycle and not rolled over, and that Professional adds higher credit limits, AI features, call recording and advanced CRM integrations. The fetched page did not show dollar amounts or credit counts.

Third-party reviews published in 2026 consistently report Basic at $49 per user per month on annual billing, Professional at $79 and Organization at $119 with a three-user minimum, with credits of 2,500, 4,000 and 6,000 per month. Because we could not confirm those on Apollo's own page, treat them as indicative.

Pricing: As of Nov 11, 2026: Apollo's pricing page confirms a no-time-limit Free plan and paid tiers, but did not show numbers to our fetch. Third-party figures: $49, $79 and $119 per user per month annual. Verify on apollo.io/pricing.

Strengths

• The largest free-to-start data and sequencing combination in this list.
• A parallel dialer is listed as a feature, which covers phone outreach.
• Credits are pooled across the team, which helps uneven usage.

Weaknesses

• Credits expire each cycle and different actions (such as phone numbers) consume more of them.
• Customer testimonials on the homepage, including a deliverability improvement from 72% to 94%, are self-reported and not independently verified.
• Our fetch did not expose plan prices, so cost planning needs a direct check.

Best for: Small teams that want data, sequencing and an agent in one place at a low entry cost.

Amplemarket Duo

Amplemarket sells Duo as an AI copilot for signal-based selling rather than a fully autonomous SDR. Its page says AI agents scan the market daily for buying signals, research the account, and draft a multichannel sequence for each contact, with reps staying in control and Duo never sending or changing things without visibility.

Signals include job changes, closed-lost reactivation, competitor reviews, community and social activity and profile or content engagement, and teams can add custom signals from the CRM or by API. Drafted sequences can include email, social, calls and WhatsApp, according to the FAQ.

The pricing page publishes only Startup, at $600 per month on an annual term, with 2 users and 27,000 contacts. Growth (4 users, 140,000 contacts) and Elite (10 users, 400,000 contacts) are custom. Per-user annual email credits are 13,500, 35,000 and 40,000, and phone credits are 600, 5,000 and 9,600. Duo Copilot is on every tier, Duo Voice on Growth and Elite, and Duo Inbox (draft replies) on Elite. The pricing page does not use the name Duo AI SDR.

Pricing: As of Nov 11, 2026: Startup $600/mo annual term; Growth and Elite custom. Additional users can be purchased but the price is not listed. All plans include a free trial.

Strengths

• Human-in-the-loop design suits teams that do not want an agent emailing unsupervised.
• Phone credits and a dialer are part of the core platform.
• Signals from CRM and API let you target accounts based on your own data.

Weaknesses

• Duo features are tiered, and the per-plan checkmarks for Copywriter, Competitive Intelligence and Signals were not legible in our fetch.
• The vendor numbers (a 66%+ average open rate on Duo leads, 3.2x more replies) are self-reported and open rates are an unreliable metric.
• Growth and Elite pricing is not public.

Best for: Mid-market teams with reps who will review drafts and want signals driving outbound.

Regie.ai (RegieGO)

Regie.ai now leads with RegieGO, a prospecting platform that starts from your website. The homepage says it suggests target companies and roles, finds matching buyers, enriches their contact details and drafts emails and call scripts for you to review. You can refine the ideal customer profile in chat or bring your own list.

Enrichment checks up to seven data providers in turn for every contact, and the pricing page says you pay nothing for enrichment that finds nothing. Sending is from your connected Gmail or Outlook. Calling is built in, with single-line, power and parallel dialing of up to five lines. A built-in CRM is on every plan, and you can connect HubSpot or Salesforce with optional write-back.

RegieGO's prices are public and the lowest in the paid tier of this list: Free is $0 with 250 one-time credits per person; Pro is $41 per month billed annually ($49 monthly) with 5,000 credits per month; Team is $125 per seat per month billed annually ($150 monthly) with 15,000 credits per seat and a shared pool, and a two-seat minimum.

Pricing: As of Nov 11, 2026: Free $0; Pro $41/mo annual or $49 monthly; Team $125/seat/mo annual or $150 monthly (2-seat minimum); Enterprise custom.

Strengths

• Transparent, low pricing and a free tier with no card.
• Built-in CRM and dialer mean a solo founder can run outbound without extra tools.
• Drafts are reviewed by the user, which keeps a human in the loop.

Weaknesses

• Email goes out through your own Gmail or Outlook, which limits scale and puts your primary domain at risk if you send aggressively.
• The page does not explain how credits are consumed per action.
• Fewer enterprise controls are listed outside the custom tier.

Best for: Founders and small sales teams that want prospecting, calling and drafting for tens of dollars a month.

AiSDR (Ami)

AiSDR's agent is called Ami. The product page describes live AI search from plain-English descriptions, audiences built from LinkedIn engagement, Sales Navigator lists, CSVs or CRM contacts, and outreach across email, LinkedIn, rep call tasks and video or voice notes. Replies can run on autopilot or in co-pilot mode where you approve each message, and the AI qualifies replies and books meetings once a prospect is qualified.

Pricing is unusual: pay as you go at $1.50 per person prospected, billed daily, with no monthly fee. Team plans are not published, are aimed at teams contacting 1,000+ people a month, and add AI video, voice notes, Salesforce, LinkedIn signals and a dedicated GTM engineer. A managed service costs $149 per campaign or $2,500 per month, and a warmed-up mailbox costs $33.

The vendor claims 20K+ meetings booked and replies 3-4x the industry average. These numbers come from AiSDR's own marketing. The comparison pages on the same site are also vendor material.

Pricing: As of Nov 11, 2026: $1.50 per person prospected (pay as you go), Team by quote, managed service $149 per campaign or $2,500 per month. The page also shows campaigns starting from $7.50 in one FAQ and $3 in another without reconciling them.

Strengths

• No monthly minimum, which suits pilots.
• LinkedIn connection requests, DMs and InMails sit in the same sequence as email.
• Two-way HubSpot sync with activity logging.

Weaknesses

• LinkedIn automation is exactly what LinkedIn's terms restrict; see the compliance section.
• Per-person billing can climb quickly on large lists.
• Inconsistent minimum-campaign figures on the pricing page.

Best for: Teams that want email plus LinkedIn outreach without a contract and will accept the account-restriction risk.

Unify

Unify pitches a single outbound agent with the whole toolkit, used through a chat interface with 50+ native skills. Sequences cover email, calls and social. The data layer is described as 1.1 billion people and 65 million companies plus 40+ additional sources, with a multi-vendor email and phone waterfall and real-time email validation. Signals include job changes, funding, hiring, web visits and tech stack.

Pricing is public except for the top tier. Free is $0 with limited credits and up to three seats. Base is $20 per seat per month with 800 credits per seat. Pro is $60 per seat per month with 2,400 credits and read-only HubSpot and Salesforce sync. Business is custom and adds website intent and product signals, managed Gmail and Outlook mailboxes, a Power Dialer and read-write CRM sync. Managed mailboxes are $25 per mailbox per month.

Vendor-reported results include 75% less time prospecting, 2.5x outbound reply rate and 92% show rate. They are unverified.

Pricing: As of Nov 11, 2026: Free; Base $20/seat/mo (monthly); Pro $60/seat/mo (monthly, 14-day trial); Business custom, billed annually. Unused top-up credits carry over for up to 12 months.

Strengths

• Clear seat-based pricing with a free tier.
• Signal-triggered automation and website intent on the Business tier.
• Read-write CRM sync is available, though only on Business.

Weaknesses

• CRM sync on Pro is read-only.
• Website intent and signal automations sit behind a custom-priced tier.
• The fetched homepage gives no sync details.

Best for: Startups and mid-market teams that want signals plus an agent with predictable per-seat cost.

Outreach AI Agents

Outreach is the incumbent sales engagement platform, now on the outreach.ai domain, and its AI agents page describes agents as teammates for prospecting, deal execution, conversation intelligence, coaching and forecasting. The page does not name individual agents or list channels, and it links to pricing rather than showing it.

Outreach publishes vendor numbers on the page: 90% reduced prospecting time, 45% increase in average deal size and 50% less meeting prep time, with no methodology. The page also says Outreach is recognized as a Leader by Gartner, Forrester and IDC.

Prices are not public. Third-party reviews estimate seat prices in the low hundreds of dollars per user per month with possible implementation fees and usage-based AI credits, but those are estimates and several come from sites with affiliate relationships, so we do not repeat the figures as fact.

Pricing: Not public as of Nov 11, 2026. A sales conversation is required.

Strengths

• Deep sales engagement features and an established enterprise footprint.
• Agents sit inside the system where reps already work.
• Fits regulated or large organizations that need procurement-friendly vendors.

Weaknesses

• No public pricing and no itemized agent list on the page we fetched.
• Third-party reports describe some agents as in beta or limited to CRM prospects in early 2026; confirm current status.
• Heavier setup than the lightweight tools above.

Best for: Enterprise sales orgs already on Outreach that want agents inside the existing workflow.

HubSpot Prospecting Agent

HubSpot's Prospecting Agent is part of Breeze and works inside HubSpot's CRM. According to HubSpot's company news post, pricing moved from a recurring monthly charge per enrolled contact to $1.00 per lead recommended for outreach, paid in HubSpot Credits at 100 credits per recommended lead. The change took effect April 14, the agent is available to Professional and Enterprise customers, and there is a free 28-day trial.

HubSpot's credits documentation says included credits depend on your highest subscription tier, and gives overage usage at $0.010 per credit. It does not list the Prospecting Agent's rate or the Sales Hub included amounts in the article we fetched, so confirm in the HubSpot catalog before budgeting.

The practical appeal is that the agent already sees your CRM records, activities and deals. The trade-off is that it is tied to HubSpot and to its credit system.

Pricing: As of Nov 11, 2026: $1.00 per lead recommended for outreach (100 credits), Professional and Enterprise plans, 28-day free trial. Third-party sources report Sales Hub included credits of 500, 3,000 and 5,000 for Starter, Professional and Enterprise; this was not confirmed on HubSpot pages we fetched.

Strengths

• No separate data store to sync; it works on CRM data.
• Outcome-style pricing per recommended lead is easy to forecast.
• Free 28-day trial.

Weaknesses

• Requires HubSpot Professional or Enterprise.
• Third-party summaries disagree on whether the unit is per recommended lead or per monitored contact, so confirm in your catalog.
• Less outbound-specific tooling (warmup, mailbox rotation) than a dedicated sender.

Best for: HubSpot customers who want an agent without adding another vendor.

Instantly AI

Instantly began as a cold-email sender and has layered agents on top. Its homepage lists sales, reply, lead finder, SDR, BDR and other agents, plus a Copilot that can build campaigns from a chat prompt. It highlights warmup and inbox placement tools, website visitor tracking and AI workflows triggered by site visits, replies or booked meetings.

Pricing is split across bundles, outreach plans, credits, enterprise and a VIP service. Bundles: Starter $94 per month (5,000 emails per month, 1,000 uploaded contacts, 1,500 credits, AI Sales Agent), Scale $194 (100,000 emails, 25,000 contacts, 5,000 credits, AI Reply Agent and advanced deliverability features) and Agency $555 (500,000 emails, 100,000 contacts, 10,000 credits). Standalone outreach plans start at $47 per month for Growth. The page repeats some plan names at different prices in different tabs, so confirm at checkout.

Instantly's lead database is listed at 450M+ B2B contacts. The homepage says 50,000+ sales teams use it, and it quotes customer testimonials such as 100,000 emails across 20+ domains with 20%+ reply rates. Those are customer-supplied.

Pricing: As of Nov 11, 2026: Starter $94, Scale $194, Agency $555 per month (yearly savings of about 10% shown); Growth outreach plan $47/mo. Credits plans from $47. Enterprise and VIP custom.

Strengths

• The strongest sending infrastructure story: unlimited email accounts and warmup on outreach plans.
• Low entry price and wide volume range.
• Agents can be added to an email-first stack without replacing it.

Weaknesses

• Primarily email; LinkedIn and phone are not the center of the product.
• Pricing page shows conflicting figures for the same plan names in different sections.
• High-volume cold email draws the sharpest compliance and reputation risk.

Best for: Agencies and teams that send high email volume and want to control their own infrastructure.

Data, Channels and Deliverability

Data quality decides whether any agent works. A fast agent working from a stale list simply bounces faster. The table below summarizes what each vendor publishes about data, sending infrastructure and CRM sync. Where a cell says not itemized, the fetched page did not say.

Three patterns matter more than the logos. First, waterfall enrichment (Clay, RegieGO, Unify, Instantly) checks several providers in turn, which usually finds more contacts than one database and, on RegieGO, means you pay only when data is found. Second, who owns the mailbox changes your risk. 11x and Unify manage mailboxes for you, RegieGO uses your own Gmail or Outlook, and AiSDR sells warmed mailboxes at $33 each. Third, CRM sync direction varies: Unify's Pro tier is read-only, while read-write needs Business.

Before any of these tools sends for you, check the basics of email authentication on the domain you will use:

# Before any AI SDR sends from a domain, confirm authentication records exist.
# Replace example.com with your sending domain.
dig +short TXT example.com | grep -i "v=spf1"          # SPF
dig +short TXT selector1._domainkey.example.com        # DKIM (selector varies by sender)
dig +short TXT _dmarc.example.com                      # DMARC policy

# A starting DMARC record while you monitor (publish as a TXT record at _dmarc):
# v=DMARC1; p=none; rua=mailto:[email protected]

If you plan to automate the calling step, the setup questions are different from email. Our guide to building an AI phone calling agent covers the telephony side that Julian, Duo Voice and the built-in dialers abstract away.

What the Published Claims Prove

We looked for neutral, independent benchmarks of AI SDR performance and did not find any that compare these products on the same data. What exists is vendor marketing and customer testimonials. The table collects the headline numbers so you can see their type.

Two cautions apply. Open rates are unreliable because mail clients preload tracking images, so a 66% open rate does not mean 66% of people read the email. And reply rate depends on the list, the offer and the mailbox health more than on the agent. AiSDR's own page says as much about its target of 1 to 3 qualified meetings per 100 leads. Run your own pilot before trusting any of these.

Compliance: CAN-SPAM, GDPR, LinkedIn

This section is general information, not legal advice. Rules differ by country and by channel, and an AI agent sending on your behalf does not move the responsibility off you.

CAN-SPAM (United States)

The FTC's compliance guide lists eight requirements for commercial email. Do not use false or misleading header information. Do not use deceptive subject lines. Identify the message as an ad. Tell recipients where you are located. Tell recipients how to opt out. Remember that subscribers can opt out of marketing emails too. Honor opt-out requests promptly. And monitor what others are doing on your behalf. The last point matters for agents: the guide tells businesses to monitor what others are doing on their behalf, so an outside vendor or agent sending for you does not remove your duty. Each separate email in violation can be subject to penalties of up to $53,088 per the FTC page we fetched.

GDPR (EU and UK-style regimes)

Recital 47 says processing for direct marketing may be regarded as a legitimate interest, but that interest needs a careful assessment, including whether the person could reasonably expect the processing. Article 21 gives individuals the right to object to direct marketing at any time, and after an objection the data may no longer be processed for that purpose. Article 83(5) sets the higher fine tier at up to 20 million euros or 4% of worldwide annual turnover, whichever is higher. Email marketing is also shaped by national ePrivacy rules that differ between countries, so confirm the rules for each target market.

LinkedIn Terms of Service

LinkedIn's User Agreement prohibits using software, scripts, robots or other means to scrape the Services, including profiles, and prohibits using bots or other unauthorized automated methods to access the Services. LinkedIn's help page says it does not permit third-party software such as crawlers and bots, and that members using them may face account restrictions. Several tools here automate LinkedIn actions (AiSDR is explicit about connection requests, DMs and InMails), so the account risk is real even when the vendor offers it as a feature. A safer pattern is to keep LinkedIn steps as manual tasks for the rep.

A practical compliance checklist

• Put a real postal address and a working one-click opt-out in every email.
• Suppress anyone who opts out across every tool, not only the one that sent the message.
• Document your legitimate-interest assessment for EU and UK contacts and honor objections immediately.
• Keep a human in the loop for replies on pricing, legal terms and complaints.
• Do not use tools to hide who is sending, and do not use evasion tactics against LinkedIn's restrictions.
• Review your vendor's DPA. 11x offers a custom DPA on Enterprise, and AiSDR lists a SaaS contract and DPA on Team.

How to Choose

If you also need automation glue between a CRM, a sender and a spreadsheet, the n8n guide on our site shows the pattern: Antigravity and n8n integration. And if you are weighing agents on the support side of the funnel, see the sibling roundup on AI customer support agents.

A Four-Week Pilot Plan

Because the performance numbers are vendor-reported, the only trustworthy result is yours. A short, controlled pilot is cheap insurance.

1. Week 0: set the guardrails. Write the ICP brief, the exclusion list and the handoff rules. Authenticate a secondary sending domain.
2. Week 1: small list, approval mode. Send to a few hundred contacts with every message approved by a human. Check bounce rate and complaints daily.
3. Week 2: compare against your baseline. Track positive replies and booked meetings, not opens. Compare with a human-written control sequence to the same segment.
4. Week 3: widen carefully. Increase volume only if bounce and complaint rates stay low. Audit ten sent messages for factual errors about the recipient.
5. Week 4: decide. Compute cost per qualified meeting, including credits, mailboxes and rep review time.

# Example ICP brief to paste into any of these tools (adapt the values)
Segment:      Series A-C B2B SaaS, 50-500 employees, US and UK
Persona:      VP Sales, Head of RevOps
Trigger:      new sales leader in last 90 days OR hiring 3+ SDRs
Offer:        20-minute teardown of their outbound reply rate
Exclusions:   customers, open opportunities, anyone who opted out
Guardrails:   no claims about named customers, no price quotes,
              handoff to a human on any pricing or legal question

How We Evaluated

We fetched each vendor's pricing and product pages on Nov 11, 2026 and recorded what they say. Where a first-party page did not show a number (Apollo's dollar prices, Artisan, Outreach), we say so, and we used third-party figures only when labeled as such. There is no paid placement and no affiliate link in this ranking, and vendors did not review the page. We did not run campaigns on each tool, so the strengths and weaknesses reflect published documentation and our reading of the trade-offs, not measured performance. The marketing images in this article are the vendors' own Open Graph images.

Pricing, credits and plan names change frequently. If a figure here no longer matches the vendor page, trust the vendor page.

FAQ

Sources

All fetched on Nov 11, 2026 unless noted.

• 11x: Alice pricing
• 11x help center: pricing overview
• Artisan: pricing and Artisan LLM guide
• Clay: pricing and Claygent
• Apollo: homepage and pricing
• Amplemarket: pricing and Duo
• Regie.ai: pricing and RegieGO
• AiSDR: pricing and homepage
• Unify: pricing and homepage
• Outreach: AI agents
• HubSpot: Prospecting Agent pricing announcement and credits and billing
• Instantly: pricing and homepage
• FTC: CAN-SPAM compliance guide
• GDPR Article 21, Article 83 and Recital 47
• LinkedIn: User Agreement and help: prohibited software
• YouTube: What Is Artisan? Meet Ava (Artisan)