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Glean vs Truffle

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. Truffle publishes a starting price ($199); Glean does not. Only Truffle has a free tier. Only Glean ships a public API.

GleanPermission-aware search and agents across company applicationsTruffleSlack bot that answers repeated team questions and writes documentation from past conversations.

Side by side

FactGleanTruffle
CategoryPersonal & Enterprise SearchKnowledge Management & Wikis
Pricing modelContactFreemium
Starts at—$199 month
Public APIYesNo
PlatformsWeb, API, Slack App, Chrome ExtSlack App
CompanyGlean TechnologiesTruffle
Launched20192023
Last verifiedSep 6, 2026Sep 1, 2026

What our research says

Glean

Glean is the reference implementation of permission-aware enterprise search, and permissions are the hard part everyone else underestimates. It is also priced so that only companies with a real sprawl problem can justify it.

Pros

  • Permission inheritance from each connected system is done properly, not approximated
  • Answers cite and link the underlying documents rather than paraphrasing them away
  • Connector coverage across the mainstream SaaS estate is broad
  • Commercially solid: about $300M ARR by May 2026 at a $7.2B valuation

Cons

  • No published price anywhere, and contracts start in six figures
  • Value depends entirely on connector coverage of your specific stack
  • Index quality inherits whatever mess exists in the source systems
  • Overlaps increasingly with Microsoft and Google's bundled offerings, which cost nothing extra

Truffle

A reasonable fit for a team tired of answering the same onboarding or process questions in Slack every week, since it learns from real past answers instead of a manually written FAQ. It only works inside Slack, so it isn't useful if a team's knowledge lives elsewhere.

Pros

  • Learns from actual past Slack answers instead of requiring someone to write a FAQ from scratch
  • Generates documentation as a byproduct of normal Slack conversation
  • Free community plan removes cost for non-profit Slack communities

Cons

  • Locked entirely to Slack; no support for other chat tools or a standalone knowledge base
  • Free tier's 15-answer monthly cap is tight for any team above a handful of people

Which one fits

Choose Glean if you need

  • Organisations above roughly 500 people whose knowledge is scattered across a dozen SaaS tools
  • Regulated or security-conscious buyers who need source-system permissions honoured exactly
  • Teams building internal agents that need governed access to company context

Choose Truffle if you need

  • Slack-based teams with repetitive onboarding or process questions
  • Non-profit communities wanting a free tier

More comparisons

Browse all Personal & Enterprise Search →