Kelu vs Brainfish
Both platforms deliver a citation-backed AI support agent with grounding, evals, and gap analysis. Brainfish is B2B-focused with personalisation and demo-first pricing; Kelu has broader source coverage (git, OpenAPI, community forums), an MCP + agents surface, and a public free tier.
Feature comparison
Information about Brainfish is drawn from their public website.
Where Kelu focuses differently
Broader source coverage on one plan
Brainfish covers docs, KBs, tickets, Slack, Notion, Google Drive, ReadMe, and call transcripts. Kelu covers all of those plus GitHub, OpenAPI specs, Confluence, OneDrive, Salesforce, Linear, Discourse, Stack Overflow, and YouTube — useful for teams whose product knowledge lives in code and community forums as well as docs.
Public pricing and a free tier
Brainfish is demo-first — you don't know the number until sales tells you. Kelu publishes pricing openly and offers a free plan with no credit card, so you can evaluate the product against your own docs before talking to anyone.
Bots on every major chat platform
Kelu ships native Slack, Discord, and Microsoft Teams apps with slash commands, mentions, forum auto-reply, thumbs feedback, and shared-app install. One knowledge base, every chat surface your team already uses.
MCP and open protocols
Beyond the assistant, Kelu has an MCP server for AI IDEs and a browser extension side panel. Surface area for future product work is unusually wide.
Frequently asked questions
Is Kelu a good replacement for Brainfish?
For B2B support with docs + KB + tickets as sources, both are solid. Kelu adds git/OpenAPI/community sources, Discord and Teams bots, and public pricing with a free tier. If personalisation by customer tier is the primary requirement and cost isn't a concern, Brainfish's personalisation model is more built-out.
How does retrieval quality compare?
Both use vector retrieval with grounding and citations. Kelu layers full-text (BM25) and reciprocal rank fusion on top of vectors, rewrites the query with an LLM before search, and reranks with a cross-encoder — designed to catch exact-match queries (error codes, SKUs) that vector-only search misses.
Can I migrate from Brainfish?
Yes. Reconnect the same sources (docs, Notion, Google Drive, ReadMe, tickets), embed the widget, install the Slack/Teams app, and you're running. Most teams are live in an hour.
How does pricing compare?
Kelu: Free (100 questions/mo), Pro $99/mo (1,000 questions, 5 KBs), Enterprise custom. Brainfish doesn't publish pricing — book a demo to get a number.
Is my data used to train models?
No. Your connected content and end-user conversations are never used to train models. PII masking and zero-retention modes are built in.
See for yourself
Connect your docs and get your first AI-powered answer in under 5 minutes. No credit card required.