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Best Free AI Agent Builders of 2026

Updated · 5 picks · live pricing · affiliate disclosure

Hybrid AI plus human approval; Free tier ships 200 workflow steps monthly with 50+ integrations.

BEST OVERALL6.3/10

Relay.app

Hybrid AI plus human approval; Free tier ships 200 workflow steps monthly with 50+ integrations.

Free 200 steps/mo permanent; cancel-anytime

How it stacks up

  • Free 200 steps/mo

    vs Lindy autonomous

  • Pro $9/user/mo upgrade

    vs n8n technical workflow

  • Human-in-loop gates

    vs Botpress chatbot-only

#2
n8n6.0/10

From $20/mo

View
#3
Botpress5.4/10

From $79/mo

View

All picks at a glance

#PickBest forStartingScore
1Relay.appBest free human-in-loop, hybrid AI plus approval gates$9.00/mo6.3/10
2n8nBest free overall, fair-code workflow with 400+ integrations$20.00/mo6.0/10
3BotpressBest free chatbot builder, customer-facing AI bots$79.00/mo5.4/10
4CrewAIBest free multi-agent framework, MIT Python OSS$3,500.00/mo5.3/10
5LindyBest free mainstream no-code, drag-and-drop consumer$49.99/mo5.3/10

Quick pick by use case

If you only have thirty seconds, find your situation below and skip to that pick.

Compare all 5 picks

Top spec
#1Relay.app6.3/10$9.00/mo$108.00/yrFree 200 steps/mo
#2n8n6.0/10$50.00/mo$600.00/yr$492/yr moreCommunity fair-code free
#3Botpress5.4/10$79.00/mo$948.00/yr$840/yr moreFree $5 AI credit/mo
#4CrewAI5.3/10$8,000.00/mo$96,000.00/yr$95,892/yr moreOSS MIT free self-host
#5Lindy5.3/10$49.99/mo$599.88/yr$491.88/yr moreFree 400 tasks/mo
#1

Relay.app

6.3/10

Best free human-in-loop, hybrid AI plus approval gates

Hybrid AI plus human approval; Free tier ships 200 workflow steps monthly with 50+ integrations.

PlanMonthlyAnnualWhat you get
FreeFreeRelay.app free tier with 200 workflow steps per month and 50+ integrations
Professional$9.00/mo$108.00/yrRelay.app professional tier per user with 5K steps and premium AI models
Team$29.00/mo$348.00/yrMid Relay.app tier per user with 25K steps and shared workflows plus roles
Enterprise$100.00/mo$1,200.00/yrPremium Relay.app tier with unlimited steps plus SSO and dedicated CSM

Relay.app is the hybrid AI workflow pick that blends AI steps with human-in-the-loop approval gates. Founded 2022 in San Francisco and backed by Tiger Global and Khosla Ventures. Around 50,000-plus users by Q4 2024. The wedge for free readers: Free tier ships 200 workflow steps monthly with 50-plus integrations and explicit support for steps requiring human review before continuing. No other catalog pick designs around approval gates at the free tier.

Free ships 200 workflow steps a month with the integration library and AI plus human-in-loop steps. Professional is the upgrade tier at nine dollars per user monthly with five thousand steps and premium AI models. Team adds 25K steps plus shared workflows and roles. Free readers run small personal approval workflows indefinitely; the upgrade hits when step count or team size grows.

The trade-off versus Lindy is autonomous-only versus approval-gated; Relay.app is intentionally human-supervised where Lindy runs autonomously by default. The trade-off versus n8n is workflow complexity; Relay.app is purpose-built for human-supervised steps where n8n handles general automation. For free readers running business processes that require human oversight, Relay.app fits cleanest.

Pros

  • Free tier with 200 workflow steps a month
  • Hybrid AI plus human-in-loop approval gates
  • 50+ integrations on Free tier
  • Per-user pricing on Pro at nine dollars per user monthly
  • Founded 2022; rapid feature iteration

Cons

  • 200-step ceiling on Free triggers upgrade for daily-use workflows
  • Per-user pricing scales linearly with team size
Free 200 steps/moPro $9/user/mo upgradeHuman-in-loop gatesFree 200 steps/mo permanent; cancel-anytime

Best for: Free readers running business processes requiring human oversight on AI workflow steps and accept the 200-step monthly ceiling as the trade-off.

Builder ease
8
Integration breadth
7
Self-hosting
8
Value
9
Support
7
#2

n8n

6.0/10$492/yr more

Best free overall, fair-code workflow with 400+ integrations

Fair-code Node.js workflow with 400+ pre-built integrations and built-in AI agent nodes; around 200K+ self-hosted users.

PlanMonthlyAnnualWhat you get
Community OSSFreen8n self-hosted open source with 400+ integrations under fair-code license
Cloud Starter$20.00/mo$240.00/yrn8n hosted cloud entry tier with 2.5K executions per month
Cloud Pro$50.00/mo$600.00/yrMid n8n cloud tier with 10K executions and 15 active workflows plus admin
Enterprise$1,500.00/mo$18,000.00/yrEnterprise n8n tier with self-hosted plus SSO/RBAC plus external secrets

n8n is the open-source workflow automation pick and the largest community among free AI agent builders. Founded 2019 in Berlin and backed by Sequoia and HV Capital. Around 200,000-plus self-hosted users by Q4 2024. The wedge for free readers: fair-code license permits self-host with 400-plus pre-built integrations and built-in AI agent nodes; competitors are either closed-source SaaS or open-source-without-integrations.

Community is fair-code-licensed Node.js free forever for self-hosted deployment with the full integration marketplace. Cloud Starter is the cheapest paid tier at twenty dollars monthly with hosted execution. Cloud Pro adds higher execution limits and admin features at the upgrade tier. Enterprise covers self-hosted enterprise with SSO, RBAC, and external secrets at custom contract pricing. Free readers stay on Community self-host indefinitely.

The trade-off versus Lindy is the workflow-engineering learning curve; n8n requires understanding nodes, triggers, and data transformation patterns where Lindy ships drag-and-drop. The trade-off versus CrewAI is multi-agent depth; n8n handles sequential workflows well but is not a multi-agent framework. For free technical creators who want the broadest integration ecosystem with AI agent nodes, n8n is the right call.

Pros

  • Fair-code license with self-host free forever and 400+ pre-built integrations
  • Around 200K+ self-hosted users; mature community since 2019
  • Built-in AI agent nodes plus standard workflow automation
  • Cloud Starter at twenty dollars monthly for hosted execution upgrade
  • Berlin-based with EU data residency on self-host

Cons

  • Workflow-engineering learning curve for non-technical users
  • Self-hosting requires DevOps for production deployments
Community fair-code freeCloud Starter $20/mo400+ integrationsCommunity free forever; cancel Cloud anytime

Best for: Free technical creators who want the broadest integration ecosystem with AI agent nodes and accept self-host operational tax for unlimited usage.

Builder ease
9
Integration breadth
8
Self-hosting
7
Value
10
Support
7
#3

Botpress

5.4/10$840/yr more

Best free chatbot builder, customer-facing AI bots

Around 500K+ chatbot deployments on Botpress; Free tier ships five dollars monthly AI credit plus 5 integrations.

PlanMonthlyAnnualWhat you get
FreeFreeBotpress free tier with $5 monthly AI credit for chatbot building
Plus$79.00/mo$948.00/yrRealistic mainstream Botpress tier with 10K messages and premium integrations
Team$495.00/mo$5,940.00/yrMid Botpress tier with 50K messages and multi-agent workspace plus SSO basic
Enterprise$3,000.00/mo$36,000.00/yrPremium Botpress tier with unlimited messages plus custom integrations and SLA

Botpress is the customer-facing chatbot specialist and the largest deployment community in chatbot-specific agent builders. Founded 2017 in Quebec and backed by Decibel and Inovia. Around 500,000-plus chatbot deployments by Q4 2024. The wedge for free readers: Free tier ships five dollars monthly AI credit plus standard chatbot builder plus 5 integrations, sufficient for testing customer-facing bots on websites, WhatsApp, and Slack. No other catalog pick specializes in customer-facing conversational AI at the free tier.

Free ships five dollars monthly AI credit, standard chatbot builder, and 5 integrations. Plus is the upgrade tier at seventy-nine dollars monthly with 10K messages plus premium integrations and advanced analytics. Team adds 50K messages plus multi-agent and SSO basic. Free readers test chatbot deployments and small-traffic production bots; the upgrade hits when message volume grows past roughly the five-dollar credit ceiling.

The trade-off versus Lindy is scope; Botpress is chatbot-only while Lindy covers general-purpose agent automation. The trade-off versus n8n is conversational depth; Botpress is purpose-built for customer dialogues, where n8n handles event-driven workflows. For free readers building customer-facing chatbots specifically, Botpress is the right call.

Pros

  • Around 500K+ chatbot deployments (largest chatbot-specialist community)
  • Free tier with five dollars monthly AI credit for testing
  • Multi-channel deployment on web, WhatsApp, and Slack
  • Customer-facing chatbot specialist since 2017
  • Plus upgrade at seventy-nine dollars monthly for 10K messages

Cons

  • Chatbot-only scope; not for internal workflow automation
  • Five-dollar AI credit ceiling on Free triggers upgrade quickly at any traffic
Free $5 AI credit/moPlus $79/mo upgrade~500K deploymentsFree $5 AI credit/mo permanent; cancel-anytime

Best for: Free creators building customer-facing chatbots on websites or messaging platforms who accept chatbot-only scope as the trade-off.

Builder ease
8
Integration breadth
8
Self-hosting
8
Value
8
Support
7
#4

CrewAI

5.3/10$95,892/yr more

Best free multi-agent framework, MIT Python OSS

MIT-licensed Python multi-agent framework for self-hosting; around 100K+ developers building agentic systems.

PlanMonthlyAnnualWhat you get
Open SourceFreeCrewAI free MIT-licensed Python multi-agent framework with self-hosted Crews and Flows
Enterprise FreeCustomCustomCrewAI hosted Crew runtime trial with limited free credits
Enterprise$3,500.00/mo$42,000.00/yrCrewAI hosted enterprise tier with RBAC plus SSO plus audit logs
Enterprise Plus$8,000.00/mo$96,000.00/yrPremium CrewAI tier with self-hosted multi-region plus dedicated CSM and SLA

CrewAI is the MIT multi-agent Python framework pick and the largest multi-agent community among free agent builders. Founded 2023 in San Francisco and backed by Andreessen Horowitz. Around 100,000-plus developers by Q4 2024. The wedge for free readers: MIT permissive license, Python-native multi-agent orchestration with defined roles and shared goals, and self-host with zero licensing cost. No other catalog pick offers true multi-agent orchestration on a free MIT-licensed path.

Open Source is MIT-licensed Python framework free forever for self-hosting with Crews and Flows. Enterprise Free is a limited trial of hosted Crew runtime with standard observability. Enterprise is the upgrade tier at custom contract pricing with hosted enterprise platform plus RBAC and SSO. Enterprise Plus adds self-hosted multi-region plus dedicated CSM. Most free developers stay on the OSS tier indefinitely; managed Enterprise is for orgs that need observability and compliance at scale.

The trade-off versus n8n is the developer-only audience; CrewAI requires Python skills and familiarity with LLM API patterns. The trade-off versus Lindy is non-technical accessibility; non-developers cannot use CrewAI directly. For free Python developers building multi-agent systems, CrewAI is the only fit in this lineup.

Pros

  • MIT permissive license; all commercial use allowed at any revenue level
  • Around 100K+ developers (largest multi-agent framework community)
  • Python-native multi-agent orchestration with defined roles and shared goals
  • Self-host on standard Python infrastructure; OSS free forever
  • Andreessen Horowitz funded; rapid framework iteration

Cons

  • Developer-only audience; non-developers cannot use directly
  • Python plus LLM API knowledge required to build production agents
OSS MIT free self-host~100K developersMulti-agent PythonOSS MIT free forever; trial available on Enterprise

Best for: Free Python developers building multi-agent systems on self-hosted infrastructure who want MIT license and zero cloud lock-in.

Builder ease
9
Integration breadth
7
Self-hosting
5
Value
10
Support
7
#5

Lindy

5.3/10$491.88/yr more

Best free mainstream no-code, drag-and-drop consumer

Around 500K+ users on the largest no-code consumer AI agent; Free tier ships 400 monthly tasks.

PlanMonthlyAnnualWhat you get
FreeFreeLindy free tier with 400 monthly tasks for no-code AI agent building
Pro$49.99/mo$599.88/yrRealistic mainstream Lindy tier with 5K tasks and premium integrations
Business$299.99/mo$3,599.88/yrMid Lindy tier with 30K tasks and team workspace plus multi-step agents
Enterprise$1,500.00/mo$18,000.00/yrPremium Lindy tier with custom contract plus SSO and dedicated CSM

Lindy is the mainstream no-code consumer pick and the largest community among free SaaS agent builders. Founded 2022 in San Francisco and backed by Andreessen Horowitz. Around 500,000-plus users by Q4 2024. The wedge for free readers: drag-and-drop UI that non-developers can use to build functional AI agents, plus 400 monthly tasks on the Free tier sufficient for personal use cases like email triage and lead enrichment. No other catalog pick offers consumer-grade no-code at this scale.

Free ships 400 monthly tasks for testing and light personal use. Pro is the upgrade tier at the realistic mainstream rate with five thousand monthly tasks plus premium integrations like Slack and email triggers. Business adds 30K tasks plus team workspace and multi-step agents at the next upgrade. Free readers run small personal automations indefinitely; the upgrade hits when daily task volume grows past roughly thirteen tasks per day.

The trade-off versus n8n is integration depth; Lindy ships fewer integrations than n8n's 400-plus. The trade-off versus CrewAI is multi-agent orchestration; Lindy is single-agent or sequential by default. For free non-technical creators who want a polished consumer-grade SaaS no-code path, Lindy is the right call.

Pros

  • Around 500K+ users (largest no-code consumer AI agent community)
  • Drag-and-drop builder accessible to non-developers
  • Free tier with 400 monthly tasks for personal use
  • Andreessen Horowitz funded; rapid feature iteration
  • Realistic personal task volume (a dozen tasks daily) fits Free indefinitely

Cons

  • Integration library smaller than n8n (no 400-plus marketplace)
  • Single-agent or sequential by default; no true multi-agent orchestration
Free 400 tasks/moPro $49.99/mo upgrade500K+ usersFree 400 tasks/mo permanent; cancel-anytime

Best for: Free non-technical creators who want a polished consumer-grade SaaS no-code path and accept smaller integration library as the trade-off.

Builder ease
9
Integration breadth
8
Self-hosting
9
Value
8
Support
7

How we picked

Each pick gets a transparent composite score from price, features, free-tier availability, and editor fit. Pricing flows from our live database, so when a vendor changes prices the score updates here too.

We weight price at 40 percent, features at 30, free tier at 15, fit at 15. n8n leads because fair-code self-host with 400-plus integrations is the strongest free-forever defensibility for technical creators. See the parent /best/agent-builders guide for premium-only picks like Bardeen and Stack AI excluded from this lens.

We don't claim "30,000 hours of testing." Our methodology is the formula above plus the editor's published verdict for each pick. Verifiable, auditable, and updated when the underlying data changes.

Why trust Subrupt

We're a subscription tracker first, a buying guide second. Every claim on this page is something you can check.

By use case

Best free overall

n8n

Read the full review →

Best free multi-agent framework

CrewAI

Read the full review →

Best free mainstream no-code

Lindy

Read the full review →

Best free chatbot builder

Botpress

Read the full review →

Best free human-in-loop

Relay.app

Read the full review →

How to choose your Free AI Agent Builder

OSS self-host vs SaaS free tier is the only question that matters

Most 'best free AI agent builder' lists conflate two genuinely different paths. OSS self-host covers n8n (fair-code) and CrewAI (MIT). Self-host is dollar-zero on licensing but readers pay infrastructure (typically a small VPS at five to fifteen dollars monthly) and absorb the operational tax of running Node.js or Python plus dependencies. SaaS free tiers cover Lindy Free (400 monthly tasks), Botpress Free (five dollars AI credit), and Relay.app Free (200 workflow steps). SaaS free tiers ship managed hosting at zero dollars but cap somewhere; the cap is what triggers the upgrade. The reader who searches 'best free AI agent builder' and has DevOps capacity wants OSS self-host; the reader without DevOps wants a SaaS free tier and accepts the cap as the trade-off.

Cap thresholds on SaaS free tiers

Each SaaS free tier here has a different cap and reader regret lives where the cap bites first. Lindy Free covers 400 monthly tasks; the cap bites at roughly thirteen tasks per day or any production-scale automation. Botpress Free ships five dollars monthly AI credit; the cap bites quickly at any meaningful chatbot traffic because LLM inference on customer dialogues consumes credit fast. Relay.app Free covers 200 workflow steps a month; the cap bites for daily-use workflows averaging more than roughly six steps per day. The honest sequencing: solo personal-use readers run all three Free tiers indefinitely; production-bound readers hit Botpress's AI credit cap first, then Relay.app's step cap, then Lindy's task cap.

Self-host operational tax across n8n and CrewAI

OSS self-host is dollar-zero on licensing but readers pay infrastructure plus operational labor. n8n self-host runs on a single VPS at around five to twenty dollars monthly with the SQLite or Postgres backend; the operational tax is workflow runtime monitoring, backup of workflow definitions, and patch management. CrewAI self-host runs on standard Python infrastructure (often a small EC2 or VPS) at around ten to thirty dollars monthly; the operational tax is Python dependency management, LLM API key rotation, and Crew runtime debugging. For teams without DevOps capacity, the Cloud upgrades trade operational labor for managed hosting at twenty dollars per project monthly on n8n Cloud Starter or Enterprise pricing on CrewAI managed Crew runtime. The realistic decision is whether the team values OSS auditability enough to absorb the operational tax versus paying managed Cloud rates.

Build-vs-buy: when custom Python beats free agent platforms

Many AI agent use cases are simpler to solve with custom Python scripts using OpenAI API directly than with free agent platforms. The honest framework: if your agent does one thing (categorize emails, summarize documents, schedule meetings), custom Python with the OpenAI API costs around ten cents to a dollar per execution at OpenAI rates and one hundred to two hundred lines of code; the same use case on Lindy Pro hits the 400-task Free cap quickly. Free agent platforms pay off when you need multi-tool integrations not easily wired in custom Python, no-code maintenance for non-developer teams, production observability and audit logs, or human-in-the-loop approval. For simple single-purpose agents, custom Python beats free platforms on both flexibility and ceiling-free usage.

When to upgrade to a paid tier (cross-link to parent)

Free paths cover most starter projects but each pick has a clear upgrade trigger. n8n Community self-host outgrows when DevOps capacity becomes the bottleneck rather than licensing; Cloud Starter at twenty dollars monthly covers managed hosting. CrewAI OSS outgrows when observability and compliance at scale matter; Enterprise pricing covers managed Crew runtime. Lindy Free outgrows past 400 monthly tasks; Pro at the realistic mainstream rate. Botpress Free outgrows past the five-dollar AI credit; Plus at seventy-nine dollars monthly. Relay.app Free outgrows past 200 monthly steps; Pro at nine dollars per user monthly. At any of those triggers, see [our /best/agent-builders guide](/best/agent-builders) for the broader paid lineup including Bardeen, Stack AI, and CrewAI Enterprise tiers excluded from this lens.

Frequently asked questions

Are these free tiers genuinely free forever or limited trials?

OSS self-host (n8n fair-code, CrewAI MIT) is genuinely free forever on licensing; you pay infrastructure only. SaaS free tiers are free indefinitely but with caps: Lindy Free covers 400 monthly tasks, Botpress Free covers five dollars monthly AI credit, Relay.app Free covers 200 workflow steps. None of the picks here are time-limited trials.

Does Subrupt earn a commission from these free picks?

On a few. We disclose this on every /best page. Self-host OSS (n8n Community, CrewAI OSS) has no affiliate path because there is no transaction. SaaS free tiers themselves have no transaction. Cloud upgrades on n8n, Lindy, Botpress, Relay.app, and CrewAI Enterprise have paid plans where we earn commission only on conversion. The composite ranking weights price at 40 percent, features at 30, free tier at 15, fit at 15; none tuned by affiliate rate.

Why is n8n ranked first over CrewAI?

n8n wins on integration ecosystem because 400-plus pre-built integrations plus around 200,000 self-hosted users is the strongest free-forever defensibility for general-purpose AI workflow. CrewAI wins on multi-agent depth specifically. The decision pivots on use case. Teams running event-driven workflows with many integrations pick n8n. Python developers building multi-agent systems pick CrewAI. Both are OSS and both are genuinely free for self-host.

How much does self-hosting n8n actually cost in infrastructure?

A small n8n deployment runs on a single VPS with SQLite or Postgres. Realistic monthly infrastructure: a five-dollar VPS with SQLite for testing, around fifteen dollars monthly with managed Postgres for production. Production typically runs staging and prod, closer to thirty dollars monthly. Above that, you absorb the operational tax of patching, backups, monitoring, and on-call. Cost is comparable to n8n Cloud Starter at twenty dollars monthly; trade-off is labor versus managed.

Can a non-developer actually build production agents on free tiers?

Yes on Lindy Free with caveats. Drag-and-drop UI lets non-developers build agents like email triage and lead enrichment within the 400-task ceiling. Botpress Free covers customer-facing chatbots within the five-dollar AI credit. Relay.app Free covers approval-gated workflows within 200 monthly steps. n8n and CrewAI are not non-developer fits. For free non-developers, Lindy is the friction-free path.

When should I use custom Python instead of free agent platforms?

For single-purpose agents (categorize emails, summarize documents, schedule meetings), custom Python with the OpenAI API costs around ten cents to a dollar per execution and roughly two hundred lines of code; the same use case on Lindy Pro hits the 400-task Free cap quickly. Free agent platforms pay off when you need multi-tool integrations not easily wired in custom Python, no-code maintenance for non-developer teams, production observability, or human-in-the-loop approval.

Are multi-agent systems worth the orchestration overhead?

Rarely on free tiers. Most production AI agent use cases are single-agent workflows that work without orchestration. Multi-agent traps include splitting sequential tasks into parallel (coordination overhead), supervisor agents that just route (latency and cost), and agent debates that rarely improve quality. Start with single-agent designs on Lindy or n8n; add multi-agent (CrewAI) only when a single agent cannot solve the use case.

How do I migrate from a free SaaS to OSS self-host?

Lindy and Botpress are SaaS-only with no migration path; rebuild the workflow on n8n self-host or custom Python. Relay.app exports workflow definitions as JSON; n8n imports JSON workflows directly with the n8n CLI. CrewAI agents are written in Python; migrating from a no-code SaaS to CrewAI requires translating drag-and-drop logic into Python code. Plan one to three weeks for a non-trivial migration; longer for production workflows with many integrations.

EU data residency: which free picks store agent data in the EU?

n8n self-host gives full control of where data lives; n8n is Berlin-based with EU residency on Cloud. CrewAI self-host gives full control. Lindy Free runs on Lindy infrastructure with US default; EU residency on Enterprise only. Botpress Free routes through US infrastructure. Relay.app Free routes through US infrastructure. For EU-resident free use, n8n self-host, n8n Cloud, and CrewAI self-host all qualify; the SaaS free tiers default to US.

How often is this guide updated?

We re-review pricing and feature changes annually at minimum, with mid-year refreshes when major vendor announcements happen. Lindy Pro pricing has been stable through 2025-2026. n8n Cloud Starter at twenty dollars monthly stable. CrewAI v0.x rapidly iterating with framework releases. The lastReviewed date reflects the most recent editorial pass.

Subrupt Editorial

The team behind subrupt.com. We track subscriptions, surface cheaper alternatives, and publish buying guides where the score formula is on the page so you can recompute it yourself. We do not claim 30,000 hours of testing. What we claim is live pricing from our database, a transparent composite score, and honest savings math against a category baseline.

Last reviewed

Citations

Affiliate disclosure: Subrupt earns a commission when you switch to a service through our recommendation links. This never changes the price you pay. We only recommend services where there's a real cost or feature advantage for you, and our picks are based on the data on this page, not on which programs pay the most.

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