Conversion GemsConversion Gems

Free AI agent builders

50 AI agent builders tools we review offer a free plan. Filter and sort the table, or open any tool's review.

Scored by the Conversion Gems editorial team · reviewed June 2026 50 tools with a free plan · median paid plan $29/mo
50 tools
DetailsPricingFree planFree trialWhat the plan includesReview
Semantic Kernel8.4 / 10FreeFreeYes—Free (MIT open-source)Review Semantic Kernel
Dify8.3 / 10Freemium$59/moYesYesFree (OSS/self-hosted); cloud from $59/moReview Dify
Pipedream8.3 / 10Freemium$29/moYesYesFree tier; paid plans from $29/moReview Pipedream
Anythingllm8.2 / 10Freemium$50/moYesYesFree (OSS); cloud from $50/moReview Anythingllm
Composio8.2 / 10Freemium$29/moYesYesFree (20k calls/mo); paid from $29/moReview Composio
Pydanticai8.2 / 10FreeFreeYes—Free (open-source, MIT license)Review Pydanticai
Agentops8.1 / 10Freemium$40/moYesYesFree up to 5K events; Pro from $40/moReview Agentops
Comet8.0 / 10Freemium$19/moYesYesFree tier; Pro at $19/moReview Comet
Crewai8.0 / 10Freemium$25/moYesYesFree (OSS); Cloud from $25/moReview Crewai
Langgraph8.0 / 10Free$39/moper seatYes—Free (OSS); LangSmith from $39/seat/moReview Langgraph
Lindy7.9 / 10Freemium$49.99/moYesYesFree trial; paid plans from $49.99/monthReview Lindy
Pickaxe7.9 / 10Freemium$29/moYesYesFree tier available; paid plans from $29/monthReview Pickaxe
Google Vertex AI Agent Builder7.8 / 10FreemiumUsage-basedpay as you goYesYesFree tier + $300 trial credit; usage-basedReview Google Vertex AI Agent Builder
Langchain Expression Language Lcel7.8 / 10FreeFreeYes—Free (open-source, part of LangChain)Review Langchain Expression Language Lcel
Activepieces7.7 / 10Freemium$5/moYesYesFree tier; paid from $5/flow/monthReview Activepieces
LangChain7.7 / 10Freemium$39/moper seatYesYesFree (OSS); LangSmith Plus from $39/seat/moReview LangChain
Pydantic AI7.7 / 10FreeFreeYes—Free (MIT open source)Review Pydantic AI
Cassidy7.6 / 10Freemium$79/moper seatYesYesFree tier; paid plans from $79/user/moReview Cassidy
continue.dev7.6 / 10Freemium$10/moper seatYes—Free (OSS); Team from $10/seat/moReview continue.dev
Devin Cognition7.6 / 10Freemium$20/moYes—Free; Pro $20/moReview Devin Cognition
Orkes7.6 / 10FreemiumCustomcontact salesYesYesFree dev tier; Enterprise custom pricingReview Orkes
Ottogrid7.6 / 10Freemium$99/moYesYesFree tier; paid plans from $99/moReview Ottogrid
Relay.app7.6 / 10Freemium$19/moYesYesFree tier; paid plans from $19/monthReview Relay.app
Botpress Studio7.5 / 10Freemium$89/moYesYesFree tier; Plus from $89/moReview Botpress Studio
Mastra7.5 / 10FreemiumFreeYesYesFree tier; paid plans availableReview Mastra
Perplexity Labs7.5 / 10FreemiumSee pricingYes—Pro plan required for LabsReview Perplexity Labs
Relevance AI7.5 / 10Freemium$19/moYesYesFree tier; paid plans from $19/monthReview Relevance AI
SmythOS7.5 / 10Freemium$39/moper seatYesYesFree tier; paid plans from $39/seat/monthReview SmythOS
Camel7.4 / 10FreeFreeYes—Free (open-source, Apache 2.0)Review Camel
Flowise7.4 / 10Freemium$35/moYesYesFree (self-hosted); Cloud from $35/moReview Flowise
Openhands7.4 / 10Freemium$20/moYesYesFree OSS; Cloud free tier, Pro $20/moReview Openhands
Devin7.3 / 10Freemium$20/moYes—Free tier; Pro $20/mo; Max $200/moReview Devin
StackAI7.3 / 10Freemium$99/moYesYesFrom $99/moReview StackAI
fixie.ai7.2 / 10Freemium$100/moYesYesFree (30 min); Pro $100/moReview fixie.ai
Autogen7.1 / 10FreeFreeYes—Free (MIT, open-source)Review Autogen
AutoGen (Microsoft)7.1 / 10FreeFreeYes—Free (MIT, open-source)Review AutoGen (Microsoft)
Chatdev7.1 / 10FreeFreeYesYesFree (open source, Apache-2.0; pay own LLM API costs)Review Chatdev
Metagpt7.1 / 10FreeFreeYes—Free (MIT, open-source)Review Metagpt
Opendevin7.1 / 10Freemium$20/moYesYesFree to self-host (MIT); Cloud Pro from $20/mo + LLM costsReview Opendevin
Wisebase7.1 / 10Freemium~$8.30/moapproximateYesYesFree tier; paid from ~$8.30/moReview Wisebase
Genspark7.0 / 10FreemiumFreeYesYesFree tier available; paid plans offer advanced featuresReview Genspark
Imagica7.0 / 10Freemium$25/moYes—Free; Pro from $25/mo (billed annually)Review Imagica
Letta7.0 / 10FreemiumFreeYesYesFree tier availableReview Letta
Manus7.0 / 10Freemium$20/moYes—Free tier; paid plans from $20/moReview Manus
Flowith6.8 / 10Freemium$17.91/moYesYesFree tier; paid plans from $17.91/moReview Flowith
Superagi6.5 / 10FreemiumFreeYes—Free to self-host (MIT); managed Cloud (paid)Review Superagi
Devika AI6.4 / 10FreeFreeYes—Free (open-source, MIT license)Review Devika AI
Steamship6.4 / 10FreemiumFreeYesYesFree tier available; paid tiers for higher usageReview Steamship
Openagents5.7 / 10FreeFreeYesYesFree (Apache-2.0 open source)Review Openagents
Agentgpt4.6 / 10Freemium$40/moYes—Free (5 runs/day); Pro $40/mo (frozen 2023)Review Agentgpt
Free

Free (MIT open-source)

Dify8.3 / 10
Freemium · $59/mo · Free trial

Free (OSS/self-hosted); cloud from $59/mo

Pipedream8.3 / 10
Freemium · $29/mo · Free trial

Free tier; paid plans from $29/mo

Anythingllm8.2 / 10
Freemium · $50/mo · Free trial

Free (OSS); cloud from $50/mo

Composio8.2 / 10
Freemium · $29/mo · Free trial

Free (20k calls/mo); paid from $29/mo

Pydanticai8.2 / 10
Free

Free (open-source, MIT license)

Agentops8.1 / 10
Freemium · $40/mo · Free trial

Free up to 5K events; Pro from $40/mo

Comet8.0 / 10
Freemium · $19/mo · Free trial

Free tier; Pro at $19/mo

Crewai8.0 / 10
Freemium · $25/mo · Free trial

Free (OSS); Cloud from $25/mo

Langgraph8.0 / 10
Free · $39/mo

Free (OSS); LangSmith from $39/seat/mo

Lindy7.9 / 10
Freemium · $49.99/mo · Free trial

Free trial; paid plans from $49.99/month

Pickaxe7.9 / 10
Freemium · $29/mo · Free trial

Free tier available; paid plans from $29/month

Freemium · Usage-based · Free trial

Free tier + $300 trial credit; usage-based

Free

Free (open-source, part of LangChain)

Activepieces7.7 / 10
Freemium · $5/mo · Free trial

Free tier; paid from $5/flow/month

LangChain7.7 / 10
Freemium · $39/mo · Free trial

Free (OSS); LangSmith Plus from $39/seat/mo

Pydantic AI7.7 / 10
Free

Free (MIT open source)

Cassidy7.6 / 10
Freemium · $79/mo · Free trial

Free tier; paid plans from $79/user/mo

continue.dev7.6 / 10
Freemium · $10/mo

Free (OSS); Team from $10/seat/mo

Freemium · $20/mo

Free; Pro $20/mo

Orkes7.6 / 10
Freemium · Custom · Free trial

Free dev tier; Enterprise custom pricing

Ottogrid7.6 / 10
Freemium · $99/mo · Free trial

Free tier; paid plans from $99/mo

Relay.app7.6 / 10
Freemium · $19/mo · Free trial

Free tier; paid plans from $19/month

Freemium · $89/mo · Free trial

Free tier; Plus from $89/mo

Mastra7.5 / 10
Freemium · Free · Free trial

Free tier; paid plans available

Freemium

Pro plan required for Labs

Relevance AI7.5 / 10
Freemium · $19/mo · Free trial

Free tier; paid plans from $19/month

SmythOS7.5 / 10
Freemium · $39/mo · Free trial

Free tier; paid plans from $39/seat/month

Camel7.4 / 10
Free

Free (open-source, Apache 2.0)

Flowise7.4 / 10
Freemium · $35/mo · Free trial

Free (self-hosted); Cloud from $35/mo

Openhands7.4 / 10
Freemium · $20/mo · Free trial

Free OSS; Cloud free tier, Pro $20/mo

Devin7.3 / 10
Freemium · $20/mo

Free tier; Pro $20/mo; Max $200/mo

StackAI7.3 / 10
Freemium · $99/mo · Free trial

From $99/mo

fixie.ai7.2 / 10
Freemium · $100/mo · Free trial

Free (30 min); Pro $100/mo

Autogen7.1 / 10
Free

Free (MIT, open-source)

Free

Free (MIT, open-source)

Chatdev7.1 / 10
Free · Free trial

Free (open source, Apache-2.0; pay own LLM API costs)

Metagpt7.1 / 10
Free

Free (MIT, open-source)

Opendevin7.1 / 10
Freemium · $20/mo · Free trial

Free to self-host (MIT); Cloud Pro from $20/mo + LLM costs

Wisebase7.1 / 10
Freemium · ~$8.30/mo · Free trial

Free tier; paid from ~$8.30/mo

Genspark7.0 / 10
Freemium · Free · Free trial

Free tier available; paid plans offer advanced features

Imagica7.0 / 10
Freemium · $25/mo

Free; Pro from $25/mo (billed annually)

Letta7.0 / 10
Freemium · Free · Free trial

Free tier available

Manus7.0 / 10
Freemium · $20/mo

Free tier; paid plans from $20/mo

Flowith6.8 / 10
Freemium · $17.91/mo · Free trial

Free tier; paid plans from $17.91/mo

Superagi6.5 / 10
Freemium · Free

Free to self-host (MIT); managed Cloud (paid)

Devika AI6.4 / 10
Free

Free (open-source, MIT license)

Steamship6.4 / 10
Freemium · Free · Free trial

Free tier available; paid tiers for higher usage

Openagents5.7 / 10
Free · Free trial

Free (Apache-2.0 open source)

Agentgpt4.6 / 10
Freemium · $40/mo

Free (5 runs/day); Pro $40/mo (frozen 2023)