Looking for a mem0 alternative?
mem0 gives your agent memory. FoxNose gives it a knowledge base — structured storage, hybrid search, and an embedded MCP server behind one endpoint. Not just what a user said last week, but the catalogs, docs, tickets, and policies your agent answers from.
FoxNose and mem0, line by line
Same category — a knowledge and memory backend for agents. Here is how the two compare on the numbers and the architecture.
| FoxNose | mem0 | |
|---|---|---|
| Entry price | Free — $0: 10K retrievals + 5K writes + 0.5 GB data + 0.1 GB vector (~26K records) | Hobby — $0: 1K retrievals/mo, 10K memories |
| Retrievals at $19/mo | 75,000 (Starter) | 5,000 (Starter) |
| Retrievals at top self-serve tier | 400,000 — Pro, $99/mo | 50,000 — Pro, $249/mo |
| What's metered | Four axes: retrievals, writes, data storage, vector storage | Retrievals and memories/adds; end users are unmetered on every tier |
| Capability gating | None — every feature is on every tier; plans differ by scale | Projects and analytics start on Growth ($79); graph memory and advanced analytics on Pro ($249) |
| MCP architecture | Embedded MCP server per API — 5 tools, same host, same auth as REST | Separate OpenMemory MCP server, deployed alongside |
| Data residency | EU-hosted; embeddings never leave the EU (Cohere multilingual via AWS Bedrock EU) | US-based pipeline |
| Search types | Structured + keyword + semantic fused in one call | Memory retrieval; graph memory on Pro |
| Surprise-bill protection | 4xx and error responses are never billed; spend cap defaults to 2× the plan; Free stops per axis with a 402 | Overage and spend-cap behaviour not stated on their pricing page |
What a dollar buys in retrievals
Retrievals are the line that scales with agent traffic. Here is the arithmetic on the two tiers most teams compare, so you can reproduce it.
75,000 ÷ 5,000 = 15× the retrievals at the same $19, before counting FoxNose's 20,000 writes and 5 GB of storage on the same plan.
400,000 ÷ 50,000 = 8× the retrievals, and $99 ÷ $249 ≈ 40% of the price.
Cases where mem0 is the better pick
Graph memory out of the box
mem0 Pro ships graph memory. FoxNose fuses structured, keyword, and semantic search in one call, but it is not a graph store — if your model needs a memory graph, mem0 has it built in.
Per-end-user memory with unmetered end users
mem0 does not meter end users on any tier. If your product is a per-user personal-memory assistant with high end-user fan-out, that billing shape can work out cheaper than metering retrievals.
A US processing preference
mem0 runs a US-based pipeline. FoxNose is EU-hosted today, with embeddings kept in the EU. If you specifically want data processed in the US, mem0 matches that.
Try the knowledge backend
Start on the Free tier — 10,000 retrievals and 5,000 writes, no credit card. Point your agent at REST or the embedded MCP server and see how it fits.
Frequently asked questions
- Is FoxNose a drop-in replacement for mem0?
- It depends on what you use mem0 for. FoxNose is a knowledge base with hybrid search and an embedded MCP server — structured knowledge your agent queries to answer end-users. If you use mem0 to store business knowledge (catalogs, docs, tickets, policies) that an agent retrieves, FoxNose covers that directly. If you use it for per-end-user conversational memory, the data model is different — see "Where mem0 fits better" above.
- How do the free tiers compare?
- FoxNose Free is $0 and includes 10,000 retrievals, 5,000 writes, 0.5 GB of data storage, and 0.1 GB of vector storage — roughly 26,000 records. mem0 Hobby is $0 with 1,000 retrievals per month and 10,000 memories. Both are usable without a credit card.
- What do I get for $19 a month?
- FoxNose Starter is $19/mo and includes 75,000 retrievals, 20,000 writes, 5 GB of data, and 1 GB of vector storage (~260K records). mem0 Starter is $19/mo with 5,000 retrievals and 50,000 memories. On the retrievals line that is 75,000 ÷ 5,000 = 15× the retrievals for the same price. No FoxNose feature is gated behind a higher tier.
- Where is my data processed?
- FoxNose is EU-hosted, and embeddings never leave the EU — they run on Cohere multilingual through AWS Bedrock in-region, with no US round-trip. mem0 runs a US-based pipeline. If you have EU data-residency requirements, FoxNose keeps the whole path in the EU; if you specifically prefer US processing, mem0 fits that.
- Will I get a surprise bill?
- On FoxNose, requests that return 4xx or error responses are never billed, and the spend cap defaults to twice the plan price ($38 on Starter, $198 on Pro) — you can set it anywhere from $0 to $500. On the Free plan each axis stops independently with an HTTP 402 rather than silently charging you. This keeps overage bounded to a number you set.
Competitor pricing checked July 16, 2026; see their pricing pages for current numbers.