Chief Revenue Buddy
Best AI SDR & agents

Best AI SDR and sales-agent tools

The AI SDR and sales-agent tools that prospect, research, and book meetings. Ranked on what they automate, pricing, and how cleanly they fit your AI stack.

19
Tools ranked
7
MCP-ready
8
With free plan
$10/mo
Starting from

Updated July 2026 · Independent, no sponsored rankings

How to pick an AI SDR in 2026

"AI SDR" covers two very different things in 2026, and picking the wrong kind wastes money. The first is the fully autonomous SDR that promises to find leads, write emails, and book meetings on its own. The second is the agent platform or AI-native workflow tool that gives a skilled operator the building blocks to automate prospecting their own way. The autonomous tools demo well but live or die on data quality and your willingness to let a bot send in your name. The builder tools take effort but give you control and far better results in the right hands.

Be honest about which you are buying. If you have a GTM engineer or an ops-minded seller, a flexible platform will beat a black-box SDR every time. If you have neither and just want meetings on the calendar, a packaged AI SDR might be worth a trial, with realistic expectations. The strongest tools in this category are the ones an agent can actually drive, which is why AI-stack fit matters more here than anywhere.

What CR Buddy weighted

Chief Revenue Buddy scored each tool on four things: what it genuinely automates versus what it markets, the quality of the data and research behind its output, real pricing, and the depth of its API and agent support. The ranking leads with editorial score and uses AI-stack fit as the tie-breaker.

The short version

Clay tops the list because it is the most AI-native tool in GTM: prompt-based research and enrichment across 100-plus providers, built for operators who want to automate prospecting. Relevance AI is the pick for building bespoke agentic sales workflows from reusable components. Artisan is the most complete packaged AI SDR if you want an autonomous agent rather than a builder.

Also weigh Crustdata for the data feed behind an agent, and 11x among the autonomous options. Start with a narrow, measurable use case before you hand a bot the keys to outbound.

Three newer entrants worth a look depending on what you're automating: Nooks for teams that live on the phone and want an AI parallel dialer, not just a writing assistant. Unify for signal-triggered warm outbound, where a sequence fires off a job change or hiring signal instead of a static list. Rox for enterprise teams wanting an AI agent layer that researches accounts and updates the CRM directly, though it's early and enterprise-priced.

If your team wants proven plays without building the automation yourselves, Expertise AI is a skills marketplace: install a pre-built play for CRM hygiene, ICP targeting, or executive outreach and it maps to your existing stack with no custom build. The free tier is honest enough to test before paying, though there's no MCP server or public API yet if you want an outside agent driving it directly.

Top picks at a glance

#ToolBest forFromScore
1Clay logoClayGTM engineers and ops-minded sellers building…Free9.0
2Crustdata logoCrustdataGTM engineers building automatedFrom ~$99/mo8.2
3Nooks logoNooksSDR teams that live on the phone and want AI …Custom8.2
4Relevance AI logoRelevance AIGTM engineers building bespoke agentic sales …Free8.0
5Unify logoUnifyHigh-growth SaaS teams running signal-based w…Free8.0
6People Data Labs logoPeople Data LabsTeams building their own enrichment or agent-…Free plan7.9
7Amplemarket logoAmplemarketOutbound teams that want one AI-native platfo…From $600/mo7.9
8Lindy logoLindyTeams automating repetitive sales ops with cu…From $49.99/mo7.9
9Reply.io logoReply.ioTeams wanting multichannel cadences plus AI a…From ~$49/user/mo7.8
10Rox logoRoxEnterprise revenue teams wanting an AI agent …Custom7.8
11Qualified logoQualifiedInbound-heavy B2B teams on SalesforceCustom7.7
12Default logoDefaultTeams modernizing inbound lead capture and ro…From $500/mo7.7
13Artisan logoArtisanTeams wanting an AI BDR to run top-of-funnel …$250/mo7.6
14Bardeen logoBardeenReps and ops who want to automate repetitive …Free7.6
15Regie.ai logoRegie.aiTeams wanting AI agents that respect brand an…From $180/user/mo7.5
16Aomni logoAomniAEs and ABM teams who need rich account intel…Free; Pro $300/month7.4
1711x logo11xFunded teams testing autonomous pipeline gene…Custom7.3
18AiSDR logoAiSDRSMBs wanting an affordableFrom ~$900/mo7.2
19Expertise AI logoExpertise AISDR and RevOps teams who want proven GTM play…Free7.0
Clay logo
#1

Clay

Top pick

Best for: GTM engineers and ops-minded sellers building automated prospecting systems.

9.0
87AI-stack fitOfficial MCP serverREST APIFree plan14-day trial
Clay product screenshot

A spreadsheet that runs your prospecting. The most AI-native tool in GTM.

Clay ships a first-party MCP server (clay.com/mcp, a 21-tool GTM server for Claude, ChatGPT, and Codex) on top of an Enterprise-tier REST HTTP API and webhooks, so assistants can drive Clay directly. It is also AI-native in-workflow with built-in Claude and GPT calls per row.

The verdict: If you're serious about AI-driven outbound, Clay is close to essential.

What's good

  • Chains 100+ data providers with AI in one workflow, waterfall enrichment that actually works
  • Built for the AI-native motion: prompt-based research at scale
  • Replaces a stack of point tools for list-building and enrichment

What's not

  • Credit-based pricing is hard to predict
  • Steep learning curve, this is a power tool

Pricing

Free, paid from ~$149/mo (billed annually)

Crustdata logo

Best for: GTM engineers building automated, signal-driven prospecting.

8.2
86AI-stack fitOfficial MCP serverREST API14-day trial
Crustdata product screenshot

Real-time company and people data via a clean API.

Crustdata ships an official hosted MCP server at mcp.crustdata.com (OAuth 2.1 with Dynamic Client Registration, 23 tools across company, people, jobs, posts, and watchers) with documented Claude and Claude Code setup. Crustdata is also built API-first on a single versioned REST surface (Bearer auth, x-api-version header) for firmographic and signal data.

The verdict: If you're coding your outbound, Crustdata is one of the best data APIs going.

What's good

  • API-first; a favorite for building AI prospecting agents
  • Fresh headcount, hiring, and signal data

What's not

  • Developer-oriented, not a point-and-click tool
  • Usage-based costs need monitoring

Pricing

From ~$99/mo (usage-based)

Nooks logo

Best for: SDR teams that live on the phone and want AI to multiply dials.

8.2
64AI-stack fitNo MCP server yetREST API
Nooks product screenshot

AI parallel dialer and agent workspace for outbound calling.

Nooks ships an official External API (developer.nooks.in) over REST plus native CRM and sequencer syncs, so data flows in and out, but there is no first-party MCP server yet, so an agent cannot drive the dialer directly.

The verdict: The category-defining AI parallel dialer, if you can clear the price.

What's good

  • Parallel dialer connects far more live conversations per hour
  • AI call analytics and coaching built into the same workspace
  • Combines dialer, prospecting, and sequencing in one place

What's not

  • Expensive: annual-only with seat minimums and opaque custom pricing
  • Overkill if your team is not high-volume on the phone

Pricing

Custom (quote only; reportedly ~$4,000-5,000/user/yr, billed annually)

Relevance AI logo

Best for: GTM engineers building bespoke agentic sales workflows.

8.0
84AI-stack fitOfficial MCP serverREST APIFree plan
Relevance AI product screenshot

Build and run a custom AI workforce of sales agents.

Relevance AI ships an official Model Context Protocol server (documented in its integrations docs) plus a full public REST API for building, triggering, and reading agents. Designed for agentic workflows, so assistants like Claude Code can drive it directly.

The verdict: One of the most flexible platforms for custom AI sales agents.

What's good

  • Build custom agents and multi-agent teams (e.g. BDR Bosh)
  • Connects to your tools and data

What's not

  • Builder requires setup and iteration
  • Costs scale with credits/runs

Pricing

Free, paid from ~$19/mo

Unify logo

Best for: High-growth SaaS teams running signal-based warm outbound.

8.0
66AI-stack fitNo MCP server yetREST APIFree plan14-day trial
Unify product screenshot

Warm outbound on autopilot: intent signals plus AI sequencing agents.

Unify exposes an open API plus webhooks on the Business tier (Analytics, Data, and Bulk APIs) and read-write CRM sync, but it is built on OpenAI's stack with no MCP server, so agents integrate over REST rather than natively.

The verdict: One of the cleanest warm-outbound platforms, if you can model the credits.

What's good

  • Signal-triggered warm outbound and sequencing in one workflow
  • Large built-in data layer (1.1B+ people, 65M+ companies)
  • Genuinely usable free tier to start

What's not

  • Credit system makes monthly costs hard to predict
  • CRM write-back is gated to the Business tier; no MCP

Pricing

Free, paid from $20/seat/mo (billed monthly)

People Data Labs logo

Best for: Teams building their own enrichment or agent-driven prospecting.

7.9
80AI-stack fitCommunity MCP serverREST APIFree plan
People Data Labs product screenshot

Person and company data as a developer-first API.

People Data Labs is a pure data API with documented REST endpoints (Person Enrichment, Company Search, IP Enrichment and more) and OpenAPI specs. There is no vendor-shipped MCP server; agent access today goes through community MCP wrappers like the open-source phxdev1 server or by calling the REST API directly.

The verdict: A foundational data API for anyone constructing custom GTM tooling.

What's good

  • Massive person/company datasets via a clean API
  • Built for enrichment pipelines at scale

What's not

  • Raw data API, not an end-user app
  • Requires engineering to operationalize

Pricing

Free plan, then Pro from $98/mo (billed monthly) or $940/yr

Amplemarket logo

Best for: Outbound teams that want one AI-native platform instead of a stack.

7.9
86AI-stack fitOfficial MCP serverREST API
Amplemarket product screenshot

An AI-native sales platform: data, sending, and a copilot.

Amplemarket ships an official vendor-operated remote MCP server at mcp.amplemarket.com/mcp (OAuth 2.0) that lets Claude, ChatGPT, and Cursor connect to an account directly. It also exposes a JSON REST API with bearer-token auth covering contacts, sequences, lead lists, calls, tasks, mailboxes, and users.

The verdict: A genuinely AI-native outbound platform if you can fit the pricing.

What's good

  • Combines data, multichannel sending, and AI (Duo) in one platform
  • Strong deliverability and intent signals

What's not

  • Custom pricing, aimed at funded teams
  • All-in-one means less best-of-breed depth

Pricing

From $600/mo (billed annually)

Lindy logo

Best for: Teams automating repetitive sales ops with custom agents.

7.9
50AI-stack fitNo MCP server yet7-day trial
Lindy product screenshot

No-code AI agents that automate sales workflows.

Lindy has no verified MCP server, and its docs do not confirm any Lindy MCP integration. Lindy offers inbound webhook triggers and an outbound HTTP request action, but no documented public REST or GraphQL API to manage or invoke the platform itself.

The verdict: A strong no-code agent builder for sales automation.

What's good

  • Build agents that handle outreach, CRM, and meeting follow-ups
  • Big library of integrations and triggers

What's not

  • Powerful agents need careful prompting
  • Credit-based costs can surprise

Pricing

From $49.99/mo (month-to-month)

Reply.io logo

Best for: Teams wanting multichannel cadences plus AI assistance in one place.

7.8
84AI-stack fitOfficial MCP serverREST API14-day trial
Reply.io product screenshot

Multichannel sales engagement with an AI SDR built in.

Reply.io ships an official Reply MCP server (hosted, API-key auth, Streamable HTTP) that plugs into Claude, Cursor, and other MCP clients, alongside the Reply API v3 REST API with webhooks. Reply.io is one of the more agent-ready tools in this category.

The verdict: A broad, AI-forward engagement platform for multichannel outbound.

What's good

  • Email, LinkedIn, calls, and SMS in one sequence
  • Jason AI SDR handles drafting and replies

What's not

  • Feature breadth has a learning curve
  • Costs add up across channels and AI

Pricing

From ~$49/user/mo (billed annually)

Rox logo
#10

Rox

Best for: Enterprise revenue teams wanting an AI agent layer over the CRM.

7.8
64AI-stack fitNo MCP server yetREST API
Rox product screenshot

AI revenue agents that research, update the CRM, and act on every account.

Rox exposes an API and native connectors for Salesforce, HubSpot, and Zendesk that read, enrich, and write CRM records automatically, but there is no public MCP server, so it is a closed agent rather than one yours can drive.

The verdict: The buzziest AI revenue-agent bet, still early and enterprise-priced.

What's good

  • Deep CRM read-write automation across accounts
  • Well-funded with marquee customers (Ramp, MongoDB, New Relic)
  • Web, Mac, and API surfaces for how reps actually work

What's not

  • Very new (founded 2024) with breadth still unproven
  • Enterprise-oriented and action-based pricing is opaque

Pricing

Custom (usage-based, by quote)

Qualified logo

Best for: Inbound-heavy B2B teams on Salesforce.

7.7
73AI-stack fitNo MCP server yetREST API
Qualified product screenshot

Piper, an AI SDR for inbound and your website pipeline.

Qualified is agentic for inbound and offers APIs plus deep Salesforce integration; no public MCP server.

The verdict: The leading inbound AI SDR if your site drives real traffic.

What's good

  • Turns website traffic into pipeline with an AI SDR
  • Tight Salesforce integration

What's not

  • Best for high-traffic, Salesforce-based teams
  • Custom pricing

Pricing

Custom (annual)

Default logo

Best for: Teams modernizing inbound lead capture and routing.

7.7
85AI-stack fitOfficial MCP serverREST API
Default product screenshot

AI-native inbound: forms, routing, scheduling, and enrichment.

Default documents native MCP access to its data layer and every tool for any agent, built inside Default or on top of it, so assistants like Claude Code can drive it directly. Default also exposes a REST-style API and bi-directional integrations (Salesforce, HubSpot, Attio, Apollo, Snowflake). The MCP support is stated in product copy rather than a published server spec, so confirm endpoints before building critical workflows.

The verdict: A tidy, AI-native replacement for a patchwork of inbound tools.

What's good

  • Combines forms, routing, scheduling, and enrichment
  • Modern, AI-native inbound stack in one tool

What's not

  • Newer platform
  • Most value for inbound-heavy teams

Pricing

From $500/mo (Growth platform fee) + per-seat

Artisan logo

Best for: Teams wanting an AI BDR to run top-of-funnel outbound.

7.6
50AI-stack fitNo MCP server yetFree plan
Artisan product screenshot

Ava, an AI BDR that researches, writes, and sends outbound.

Artisan has no public MCP server, so assistants like Claude or Codex cannot drive its Ava agent directly. It also exposes no documented public API and connects only through native integrations with Salesforce, HubSpot, Slack, Gmail, Outlook, and LinkedIn. The product is agentic internally but not externally agent-connectable.

The verdict: A leading AI SDR; powerful, but keep a human in the loop.

What's good

  • End-to-end autonomous outbound with bundled data
  • Handles research and personalization at scale

What's not

  • Autonomous output still needs human guardrails
  • Custom pricing aimed at funded teams

Pricing

$250/mo (Intern, billed annually)

Bardeen logo

Best for: Reps and ops who want to automate repetitive web + CRM tasks.

7.6
64AI-stack fitNo MCP server yetREST APIFree plan
Bardeen product screenshot

AI automation and agents for prospecting and CRM busywork.

Bardeen ships no MCP server. External control runs through its public REST API connector and developer SDK, which point an agent at RESTful endpoints over HTTPS. Agentic in concept, but not natively drivable by an MCP client.

The verdict: A handy automation layer that removes a lot of manual prospecting work.

What's good

  • Scrapes, enriches, and updates CRMs without code
  • Agent mode chains tasks across apps

What's not

  • Browser-based actions can be brittle
  • Heavier workflows take tuning

Pricing

Free, paid from $10/mo (billed monthly)

Regie.ai logo

Best for: Teams wanting AI agents that respect brand and content quality.

7.5
42AI-stack fitNo MCP server yet
Regie.ai product screenshot

AI agents plus tooling for content-driven prospecting.

Regie.ai ships no Model Context Protocol server and exposes no documented public REST or GraphQL API. Regie.ai connects to a stack through prebuilt CRM and sequencer integrations (Salesforce, Outreach, Salesloft, HubSpot) and webhooks rather than an open developer API.

The verdict: A content-savvy AI SDR platform for brand-conscious teams.

What's good

  • Auto-Pilot agents and strong on-brand content generation
  • Combines content, data, and sending

What's not

  • No free plan or trial; sales-gated entry with seat minimums
  • Broad feature set to learn

Pricing

From $180/user/mo (billed annually, 10-seat min)

Aomni logo

Best for: AEs and ABM teams who need rich account intelligence fast.

7.4
42AI-stack fitNo MCP server yetFree plan
Aomni product screenshot

An AI research agent for account intelligence and prep.

Aomni has no MCP server and is not listed in the official MCP registry, so assistants like Claude cannot drive it directly. It also publishes no public REST or GraphQL API; only native app integrations are offered, so custom programmatic access is not available.

The verdict: A sharp research agent for teams that sell into complex accounts.

What's good

  • Deep automated account research and battlecards
  • Saves hours of pre-call prep

What's not

  • Research focus, not a full sending engine
  • Custom pricing

Pricing

Free; Pro $300/month

11x logo
#17

11x

Best for: Funded teams testing autonomous pipeline generation.

7.3
72AI-stack fitNo MCP server yetREST API
11x product screenshot

Alice, an autonomous AI SDR for pipeline generation.

11x is an agentic SDR with integrations and an API; no public MCP server.

The verdict: An ambitious AI SDR; strong in theory, validate on your data.

What's good

  • Autonomous research and multichannel outreach
  • Aimed at replacing manual SDR grunt work

What's not

  • Premium pricing and onboarding
  • Results depend heavily on ICP and data
AiSDR logo

Best for: SMBs wanting an affordable, autonomous outbound assistant.

7.2
44AI-stack fitNo MCP server yet
AiSDR product screenshot

An AI SDR that books meetings across email and LinkedIn.

AiSDR ships no Model Context Protocol server, so an assistant cannot drive it directly. AiSDR also exposes no public API; HubSpot, Salesforce, Gmail, LinkedIn, Calendly, and Aircall connect through managed native connectors a GTM engineer configures during onboarding, not a developer API.

The verdict: A budget-friendly AI SDR; supervise the messaging closely.

What's good

  • Self-serve autonomous outbound with personalization
  • Transparent flat monthly pricing

What's not

  • Output quality varies by ICP and inputs
  • Newer player with a smaller track record

Pricing

From ~$900/mo

Expertise AI logo

Best for: SDR and RevOps teams who want proven GTM plays installed, not built from scratch.

7.0
44AI-stack fitNo MCP server yetFree plan
Expertise AI product screenshot

Install expert-built GTM skills and run them across your stack, no build required.

Expertise AI connects to 100+ tools (HubSpot, Salesforce, Slack, Apollo, Gong) through built-in integrations, but there is no MCP server and no documented public API below the custom Enterprise tier, so an outside agent like Claude cannot drive it directly today.

The verdict: A real skills marketplace for GTM work, held back by opaque pricing and no agent-native access yet.

What's good

  • 100+ pre-built, expert-designed skills you install rather than build
  • Broad integration list (100+ tools, including HubSpot, Salesforce, Apollo, Gong)
  • Genuinely free tier with 200 credits/day and no card required

What's not

  • Confusing multi-product pricing page (AI Agent, Booking, and Assistant are three separate priced products under one brand)
  • No MCP server and no public API outside a custom Enterprise tier

Pricing

Free, paid from $40/mo (billed annually)

How CR Buddy picks

The method

Every tool here is researched across official docs, live pricing pages, and real user reviews on G2 and Capterra, then scored on four things: fit for the job, real pricing, how well it scales as your team grows, and AI-stack fit (MCP support, API depth, and how cleanly an agent can drive it).

Chief Revenue Buddy does not claim to have hands-on tested every tool; nobody honestly has. The ranking reflects deep research and a decade of selling experience, and affiliate links never move a score. More on the method →

Frequently asked questions

What is the best ai sdr & agents tool?

Clay tops this list with an editorial score of 9/10. If you're serious about AI-driven outbound, Clay is close to essential. That said, the right pick depends on your team size, budget, and AI stack, so read each entry before deciding.

Which ai sdr & agents tools work with AI agents like Claude or ChatGPT?

Chief Revenue Buddy scores every tool on AI-stack fit: whether it offers an MCP server, the depth of its API, and how cleanly an agent can read and write its data. 7 of the 19 tools here ship MCP support or a community MCP server. See the AI-stack-fit score on each entry.

Are there free ai sdr & agents tools?

Yes, 8 of the 19 tools on this list offer a free plan. Look for the "Free plan" tag on each entry.

How does Chief Revenue Buddy rank these tools?

Tools are ordered by editorial score, with AI-stack fit as a strong tie-breaker. The score weighs fit for the job, real pricing, and how cleanly an agent can drive the tool. Affiliate links never change a score.

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