Comparison · figures as of 5 September 2026
knowmind vs. Mem0
Mem0 and knowmind both give AI agents a persistent memory: facts survive the end of a session and are available to every connected tool. The differences lie in how that memory is run and what each fact carries with it.
What Mem0 offers
Mem0 is open source under Apache-2.0, so you can self-host it at no license cost. The hosted Hobby tier includes 10,000 entries, with 1,000 retrievals per month; the Starter tier is $19 per month, Pro is $249 per month. If you want a memory layer you operate yourself and adapt in code, Mem0 is a strong default and its free hosted tier is larger than knowmind's.
What knowmind offers
knowmind is an operated service. Every fact carries provenance, a required confidence level, and a bitemporal history: what was true when, and when it was recorded. Corrections never overwrite the original, so you can reconstruct what your agent knew on any given day. Access logs are hash-chained and externally timestamped (RFC 3161). The service runs in Germany on Hetzner (Nuremberg), with a public Art. 28 GDPR data processing agreement and subprocessor list at knowmind.de/legal/avv and tenant isolation at the database level. Pro is €15 per month or €150 per year; the free tier includes 2,500 memories, one user, and a 30-day access log. There is no self-hosted edition; an on-premise option exists in the Enterprise tier (from €1,000 per month).
How to choose
Pick Mem0 if you want to self-host, extend the code, or need the larger free hosted tier. Pick knowmind if you want someone to operate the memory for you, need to show an auditor or a customer where a fact came from and what the system knew at a past date, or need an EU-operated service with a published data processing agreement. On price, knowmind Pro (€15) sits below Mem0 Starter ($19); on flexibility, Mem0's open source model is something knowmind does not offer.
| Free tier | First paid tier | Self-hosting | |
|---|---|---|---|
| Mem0 | 10,000 entries, 1,000 retrievals/month | $19/month | yes (Apache-2.0) |
| knowmind | 2,500 memories | €15/month | no (Enterprise on-premise option) |
Mem0prices and tiers were taken from the vendor's public pricing page on 5 September 2026; knowmind's own figures come from knowmind.de/pricing and our product documentation. If you find something outdated, tell us and we will correct it.
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