Vector Databases With an API
As of August 2026, AIDiveForge tracks 4 vector databases with an api. The top three by verified-data score are ContextVault, debate.tellodb, and LanceDB. Curated vector databases with an api tracked by AIDiveForge. Listings are verified against each tool's live website and re-checked regularly.
Last updated July 29, 2026 · 4 tools
Ranked by AIDiveForge's verified-data score: data completeness, verification recency, community rating, and real visitor engagement. How we rank · No tool can pay for placement.
1. ContextVault
The core mechanic is an MCP-compatible vault that Claude, ChatGPT, Codex, Copilot, and any other compatible client reads from and writes to — so the fix one developer's session surfaces becomes findable by the next. Retrieval combines vector and full-text ranking tuned for code and ops recall, which means a keyword search and a semantic search run together rather than forcing you to choose. Memory is scoped at the user, group, and org level with audit trails, so the right context reaches the right team without bleeding across projects. The ceiling arrives when you need the vault to act — ContextVault stores and retrieves, it does not plan or execute. Teams that want autonomous task chains will build that layer themselves and use ContextVault as the knowledge store underneath.
PaidFree Trial · 7 daysAPIVerified Jul 14, 2026
2. debate.tellodb
The core mechanism is fact supersession: when a user moves from NYC to SF, TelloDB marks the old location as stale and filters it from active agent context — so the LLM never hallucinates a two-year-old truth. A hybrid HNSW vector plus BM25 search index handles recall, while a separate Metric Vault layer resolves numeric queries deterministically before they ever reach the LLM. The vendor reports p99 retrieval at 4.2ms and benchmarks recall precision above 95% on LongMemEval-S against 68% for standard RAG. The engine ships as a single Rust binary, self-hostable or deployable on the vendor's platform. At v0.1.0, the surface area is narrow — this is a memory layer, not a full agent runtime.
PaidAPISelf-hostedVerified Jun 14, 2026
3. LanceDB
Open-source embedded vector database for multimodal AI with billion-scale search on Lance columnar format.
PaidAPISelf-hostedVerified Apr 22, 2026
4. SynapCores
The engine handles graph traversal, HNSW vector similarity, and in-database LLM inference inside a single MATCH statement, so the four-to-five round-trips that Pinecone plus Postgres plus an external reranker produce become one. The Community Edition ships with 161 ready-to-run recipes covering GraphRAG, fraud detection, document ingestion, and AutoML — each a runnable markdown file you can modify locally. The ceiling arrives at the infrastructure layer: multi-node clustering, Raft replication, and CDC ingest from MySQL or Postgres binlogs are paid-only features. Teams that outgrow a single host hit that wall before they hit a query performance problem. For single-host deployments, the binary wire protocol and B-tree indexes the vendor targets in a future release are not yet available.
PaidFree (Community Edition); Enterprise custom pricingAPISelf-hostedVerified Jun 9, 2026
Listings on this page are sourced and verified by the AIDiveForge data pipeline. AIDiveForge is editorially independent — no money changes hands for inclusion.