Whisper
Stores and retrieves user and company context for AI agents to remember across sessions.
≈ 2visits/mo
Emerging · estimate, read 2026-09-21
- For
- Teams building AI agents that need to remember user context and company knowledge across sessions.
- Price
- Free plan · From $9/mopricing page, read 2026-09-21 ↗
- Activity
- Maintainedrelease 4 months ago · site updated 3 months ago
- Company
- Domain since 2026domain registered
- Runs as
- API
- Store and recall user preferences and conversation history for agents
- Build shared company knowledge bases agents can query and understand
- Enable agents to improve support and coding tasks through accumulated memory
- Domain since2026domain registered
- Trust centertheir owntrust center ↗
- Privacy policy updated2025-11-12privacy policy ↗
These are Whisper's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.
- API docsretaindb.com/docsthe vendor's page ↗
- MCP docsretaindb.com/demosthe vendor's page ↗
Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.
Figure and bar: visits/mo, estimate · year: online since
- #1
Supermemory MCP
Stores and retrieves learned context for agents using a vector graph database, injecting relevant memories into model prompts in real time.
4.6kActiveFrom $19/mo - #2
Nerra
Builds a shared memory layer from your company tools and serves it to AI agents over MCP.
31Active—2024 - #3
Phoenix Grove Systems™
Provides access to open-source language models with privacy-first architecture and persistent memory across conversations.
22Active— - #4
memgram
Stores and retrieves contextual memory for AI agents across conversations with inspection and governance.
18not readFrom $29/mo - #5
Paxs
Provides a continuously learning memory layer for AI agents that evolves in place without forgetting.
14Active— - #6
bourdon
Provides shared memory for AI agents with instant recognition and background detail retrieval.
3ActiveFrom $29/mo
What is Whisper?
Stores and retrieves user and company context for AI agents to remember across sessions. It is listed in the Atlas under LLM operations.
Who is Whisper for?
Teams building AI agents that need to remember user context and company knowledge across sessions.
How much does Whisper cost?
Whisper has a free plan; paid plans start at $9/mo, per its pricing page on 2026-09-21.
Is Whisper free?
Yes, Whisper has a free plan, per its pricing page on 2026-09-21.
Do people use Whisper?
Emerging: ≈ 2 visits/mo · estimate, 2026-09.
Is Whisper still maintained?
Maintained: release 4 months ago · site updated 3 months ago.
Is Whisper safe?
We do not audit vendors. What Whisper publishes, read 2026-10-09: a trust center.
How do I cancel Whisper?
In its own words (terms of service, 2026-10-09): “Our refund policy includes the following commitments: Monthly subscriptions are non-refundable, but you may cancel at any time to avoid future charges.”
Does Whisper give refunds?
In its own words (terms of service, 2026-10-09): “Our refund policy includes the following commitments: Monthly subscriptions are non-refundable, but you may cancel at any time to avoid future charges.”
What are alternatives to Whisper?
In LLM operations, by use: Supermemory MCP, Nerra, Phoenix Grove Systems™, memgram, Paxs, bourdon.
Not quite it? Describe the job
betaFive tools from the Atlas that fit it, each judged against what you wrote.
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.