Rasa vs Botpress vs LangChain vs Voiceflow
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
Rasa
Open-source conversational AI framework with full data control
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Botpress
AI agent platform for customer support, priced by conversation.
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LangChain
Most popular framework for building LLM applications
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Voiceflow
AI agent platform for customer experience — chat, voice, and API.
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| RECATOOLS Score | 7.3 / 10 | 7 / 10 | 8.1 / 10 | 7.3 / 10 |
| Capability | ||||
| Value for money | ||||
| Ease of use | ||||
| ASEAN readiness | ||||
| API quality | ||||
| Pricing | Open Source | Freemium | Open Source | Freemium |
| Free tier | Full open source framework for self-hosting | 5 bots, 5 collaborators, 2,000 messages/month | Open source framework is free; LangSmith has a free developer tier | 2 collaborators, unlimited projects |
| Paid from | Enterprise custom pricing | $495/month (Team) | $39/month (LangSmith Plus) | $40/month (Pro) |
| Has API | ✓ | ✓ | ✓ | ✓ |
| Open source | ✓ | ✓ | ✓ | ✗ |
| Free to use | ✓ | ✓ | ✓ | ✓ |
| Users | 50000+ developers | 750k+ developers | 1m+ developers | 250k+ designers and developers |
| Founded | 2016 | 2017 | 2022 | 2019 |
| Maker | Alan Nichol, Alex Weidauer | Sylvain Paquette, Dany Fortin | Harrison Chase | Braden Ream, Michael Hood, Andrew Lawrence |
| Verdict | Rasa is the established open-source framework for building custom conversational assistants, giving developers full control over dialogue logic, NLU, and deployment. Its CALM approach blends LLMs for more natural flows w... |
Botpress has repositioned hard: it now pitches itself as an AI-native helpdesk competing directly with Zendesk and Intercom, not a general open-source chatbot framework. The self-hosted v12 platform — the version most re... |
Still the default starting point for LLM apps, and meaningfully more stable since LangChain 1.0 and LangGraph 1.0 shipped in October 2025 — agents now run on LangGraph's durable runtime, and the team has promised no brea... |
Voiceflow has moved well past its Alexa-skill-design origins; it now bills itself as "the operating system for AI customer experience," building AI agents across chat, voice and phone with a proprietary Agentic Context E... |
| Full review → | Full review → | Full review → | Full review → |
Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.