Rasa
Leading#3 in Open sourcehigh confidence
The mature conversational-AI framework (21.3k★) for teams that want full control over intent, dialogue, and on-prem deployment — a favorite in regulated industries.Our read
Why it ranks #3
About 21.3k GitHub stars and 4.9k forks, years of production use and continued active maintenance make Rasa the most established code-first conversational framework in this set.Here is the catch
steeper engineering and training-data burden than no-code tools
not a ready-made support inbox
production tuning and maintenance require specialist skills
Does this well
fine-grained control over dialogue behavior
strong on-prem and regulated-industry fit
mature framework with extensive integration patterns
Pricing
Checked by hand on 2026-07-23. Prices in this category change often — if this looks wrong, it probably is.
Key features
NLU and intent classificationdialogue and flow managementcustom actions and integrationstext and voice channel connectors
Sources we read
Quick facts
More in this area
The rest of the Open source column.- 1ChatwootThe recognized leader in open-source customer support (34.7k★) — a self-hostable omnichannel inbox (chat, email, WhatsApp, social) and the de-facto Intercom/Zendesk alternative, with AI assist.
- 2DifyThe most-starred open-source LLM-app platform (150k★) — build a support bot with RAG and agents grounded in your own product docs. Highest adoption in this list, though general-purpose.
- 4BotpressA popular open-source chatbot builder (14.8k★) with a visual flow editor and LLM reasoning — good for custom support conversation flows.
- 5TypebotAn open-source conversational form/chatbot builder (10.2k★) for embeddable support and lead-capture flows on websites and apps.
- 6huabeitech/agent-deskSelf-hosted Go helpdesk pairing a knowledge-base AI agent with an agent workspace, ticket workflows and handoff when retrieval is too weak.
- 7Hesper-Labs/owlySelf-hosted support agent covering WhatsApp, email and Twilio voice calls, merging each customer's channels into one profile and conversation history.