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Glean vs iGPT

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. iGPT publishes a starting price ($20); Glean does not. Only iGPT has a free tier. Both ship a public API.

GleanPermission-aware search and agents across company applicationsiGPTTurns your email, files and meetings into cited answers, through a chat app or a token-billed context API

Side by side

FactGleaniGPT
CategoryPersonal & Enterprise SearchPersonal & Enterprise Search
Pricing modelContactFreemium
Starts at—$20 month
Public APIYesYes
PlatformsWeb, API, Slack App, Chrome ExtWeb, API
CompanyGlean TechnologiesiGPT
Launched2019—
Last verifiedSep 6, 2026Sep 6, 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

iGPT

The interesting part is not the chat box but the plumbing under it — deduplicating quoted email text and attributing speakers across thread formats is fiddly work most 'chat with your inbox' tools skip. Selling that same layer as a token-billed API is unusual and genuinely useful if you are building on top. The unknown is the vendor itself: no company name, no address, no country.

Pros

  • Rebuilds email threads with quoted-text deduplication and participant attribution
  • Combines private context with live web data in a single cited answer
  • Developer API priced per token with no setup fee or commitment
  • States that customer email, documents and chat history are not used for model training

Cons

  • No legal entity, address or country disclosed anywhere on the site
  • Team carries a three-seat minimum, so the practical entry is $90/month
  • Token-billed API makes costs hard to forecast in advance

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 iGPT if you need

  • People whose real knowledge base is their inbox and shared drive
  • Developers who want parsed email and work-app context as an API rather than writing the parsers
  • Teams that want answers traceable back to the original thread

More comparisons

All iGPT alternatives →Browse all Personal & Enterprise Search →