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Rank #2 of 7 in Vector Databases & Memory Stores

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Milvus

Open Source

LF AI & Data Foundation / Zilliz

46.1k6.6k/yrnpm 125.9k/wk +121npm/wk -56.4k

Access

Install

pippip install -U pymilvus
dockercurl -sfL https://raw.githubusercontent.com/milvus-io/milvus/master/scripts/standalone_embed.sh -o standalone_embed.sh && bash standalone_embed.sh start

Compare head-to-head

Alternatives to Milvus

Try itExperimental

See what an agent can do with Milvus before you ever sign up. Pick a story: recorded sessions replay real probe-harness transcripts; sandboxed self-drive sessions are designed and gated (docs/TRY-IT.md).

$python3 -c 'from pymilvus import MilvusClient; c = MilvusClient("/tmp/pa-milvus-probe.db"); c.create_collection("pa_probe", dimension=8); print("PA_PROBE_OK", c.list_collections())'recorded session — replayed, not live
recorded 2026-09-04 · exit 0 · captured verbatim by our probe harness, secrets redacted

Verified integrations

Connections to other tracked products — hover a chip for the verbatim evidence quote behind it.

By theme — the product's score on each story themeBy theme

Agenticness — how well agents can access and operate the productAgenticnessevidence →

How well agents can access and operate the product

36.9/100

Automation depth — how much of the product can run unattendedAutomation depthevidence →

How much of the product can run unattended

12.0/100

Data lifecycle — stories about data lifecycle in this arenaData lifecycleevidence →

Stories about data lifecycle in this arena

0.0/100

Deployment modes — stories about deployment modes in this arenaDeployment modesevidence →

Stories about deployment modes in this arena

36.0/100

Embeddings pipeline — stories about embeddings pipeline in this arenaEmbeddings pipelineevidence →

Stories about embeddings pipeline in this arena

30.0/100

Filtering metadata — stories about filtering metadata in this arenaFiltering metadataevidence →

Stories about filtering metadata in this arena

54.0/100

Multi tenancy scale — stories about multi tenancy scale in this arenaMulti tenancy scaleevidence →

Stories about multi tenancy scale in this arena

45.3/100

Openness — open source, data portability, and self-hosting storiesOpennessevidence →

Open source, data portability, and self-hosting stories

64.2/100

Performance latency — stories about performance latency in this arenaPerformance latencyevidence →

Stories about performance latency in this arena

9.0/100

Pricing plans — plan structure and value — what each tier costs and what it unlocksPricing plansevidence →

Plan structure and value — what each tier costs and what it unlocks

26.7/100

Privacy posture — data-handling and privacy storiesPrivacy postureevidence →

Data-handling and privacy stories

12.0/100

Sdk integrations — stories about sdk integrations in this arenaSdk integrationsevidence →

Stories about sdk integrations in this arena

21.0/100

Search quality hybrid — stories about search quality hybrid in this arenaSearch quality hybridevidence →

Stories about search quality hybrid in this arena

59.0/100

Story verdicts — every judged story with its evidenceStory verdicts

What’s free: 2 free · 0 paid · 0 enterprise · 27 not stated in evidence

?

Sorted by importance (agentic first) (high → low) · 53/53 stories · click a row’s chevron for the rationale and evidence

Connect an agent via an official MCP server G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness3full8/10T

Drive the product through a documented public API G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness3full8/10T

Delegate tasks to a built-in AI assistant inside the product G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness3none0/10

Plug MCP servers into this product so it can use their tools G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness3n/a0/10

Build against official SDKs G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2full9/10X

Point an agent at llms.txt or agent-oriented docs G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2full9/10T

Run the product headlessly / in CI for automation G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2full7/10C

Operate the product with natural-language commands G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness2partial6/10T

Issue scoped/least-privilege API credentials for an agent G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2partial5/10T

Download a machine-readable API spec (OpenAPI or equivalent) G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness2none0/10

Explore an interactive API reference with runnable examples G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness2none0/10

Get AI-generated insights and suggestions from my data inside the product G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness2none0/10

Rely on versioned APIs with a documented deprecation policy G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness2none0/10

Set up automations that run autonomously in the background G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness2n/auntestednone yet

Subscribe to events via webhooks G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Use an official CLI G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Test against a sandbox environment without touching production data G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness1full7/10C

Self-host the core product G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness3full9/10X

Run approximate nearest-neighbor similarity search over embeddings with configurable distance metrics C

Core search

developerSearch quality hybrid — stories about search quality hybrid in this arenaSearch quality hybrid3full8/10X

Combine dense vector search with keyword or sparse (BM25-style) signals in one hybrid query with fusion ranking C

Hybrid

developerSearch quality hybrid — stories about search quality hybrid in this arenaSearch quality hybrid3full7/10C

Filter vector search by structured metadata conditions without wrecking recall or latency C

Filtering

developerFiltering metadata — stories about filtering metadata in this arenaFiltering metadata3full7/10C

Isolate many tenants cheaply using namespaces, partitions, or per-tenant collections with documented limits C

Tenancy

platform-engineerMulti tenancy scale — stories about multi tenancy scale in this arenaMulti tenancy scale3partial6/10C

Have the database generate embeddings at ingest and query time using built-in or configured model providers, instead of running a separate embedding pipeline C

Embeddings

ml-engineerEmbeddings pipeline — stories about embeddings pipeline in this arenaEmbeddings pipeline3partial5/10C

Export all of my data in open formats and leave G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness3partial4/10C

Define rules that trigger actions automatically on events G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth3noneuntestednone yet

Prevent my data from being used to train AI models G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture3noneuntestednone yet

Run the database embedded in-process or as a lightweight local instance for development and small workloads C

Local dev

developerDeployment modes — stories about deployment modes in this arenaDeployment modes2full9/10X

Do everything through the API that I can do in the UI G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness2full8/10T

Scale beyond one node with sharding or distributed deployment C

Scaling

platform-engineerMulti tenancy scale — stories about multi tenancy scale in this arenaMulti tenancy scale2full8/10X

Enforce granular access control (API keys, roles, per-collection permissions) on database operations C

Tenancy

platform-engineerMulti tenancy scale — stories about multi tenancy scale in this arenaMulti tenancy scale2full7/10C

Read the product's source under an open license G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness2fullfree7/10T

Run keyword/full-text search over documents inside the database without bolting on a separate search engine C

Hybrid

developerSearch quality hybrid — stories about search quality hybrid in this arenaSearch quality hybrid2full7/10C

Perform bulk operations across many items at once G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth2partial6/10X

Choose where my data is stored (region/residency) G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture2partial5/10C

Express rich filter conditions (ranges, geo, nested boolean logic, array membership) in queries C

Filtering

developerFiltering metadata — stories about filtering metadata in this arenaFiltering metadata2partial5/10C

Build against official SDKs in the major languages (Python, TypeScript, Go, Java) G

Sdks

developerSdk integrations — stories about sdk integrations in this arenaSdk integrations2partial4/10C

Control data retention and deletion G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture2partial4/10X

Plug the database into RAG and agent frameworks (LangChain, LlamaIndex, etc.) through maintained first-class integrations C

Integrations

ml-engineerSdk integrations — stories about sdk integrations in this arenaSdk integrations2partial3/10T

See published benchmarks or measured latency/recall numbers backing the database's performance claims C

Benchmarks

platform-engineerPerformance latency — stories about performance latency in this arenaPerformance latency2disputed3/10D

Tune index parameters (HNSW graph settings, index types) to trade recall against latency and memory C

Index tuning

ml-engineerPerformance latency — stories about performance latency in this arenaPerformance latency2partial3/10X

Enable vector quantization or compression to cut memory and storage cost with a documented accuracy trade-off C

Index tuning

ml-engineerPerformance latency — stories about performance latency in this arenaPerformance latency2none0/10

Pay serverless usage-based pricing with transparent per-unit costs instead of provisioning fixed clusters G

Pricing

developerPricing plans — plan structure and value — what each tier costs and what it unlocksPricing plans2none0/10

Replicate data across nodes or zones for high availability with a documented consistency model C

Scaling

platform-engineerMulti tenancy scale — stories about multi tenancy scale in this arenaMulti tenancy scale2none0/10

Upsert and delete records continuously and have changes reflected in search results quickly, with documented freshness/consistency behavior C

Freshness

developerData lifecycle — stories about data lifecycle in this arenaData lifecycle2none0/10

Use a fully managed cloud version of the database with programmatic provisioning C

Managed cloud

developerDeployment modes — stories about deployment modes in this arenaDeployment modes2none0/10

Back up collections with snapshots and restore them C

Backup

platform-engineerData lifecycle — stories about data lifecycle in this arenaData lifecycle2noneuntestednone yet

Bulk-import and bulk-export vectors plus metadata in documented formats C

Portability

developerData lifecycle — stories about data lifecycle in this arenaData lifecycle2noneuntestednone yet

Opt out of telemetry and usage tracking G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture2noneuntestednone yet

Rerank search results with built-in or first-party-integrated reranking models C

Reranking

ml-engineerSearch quality hybrid — stories about search quality hybrid in this arenaSearch quality hybrid2noneuntestednone yet

Schedule recurring jobs or workflows G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth2n/auntestednone yet

Prototype on a meaningful free tier before paying anything G

Pricing

developerPricing plans — plan structure and value — what each tier costs and what it unlocksPricing plans1fullfree8/10C

Deploy to production on Kubernetes with an official Helm chart or operator C

Self managed

platform-engineerDeployment modes — stories about deployment modes in this arenaDeployment modes1noneuntestednone yet

Version, review, and roll back my automations G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth1noneuntestednone yet

Opportunities — the stories that would move this product's scores, from its own judged verdictsOpportunitiestop 8 of 32 stories with headroom

What would move Milvus’s scores — derived from its own judged verdicts, biggest headroom first. Each line quotes what the judge found missing; shipping it (or evidencing it publicly) is the fix.

  1. Agenticness — how well agents can access and operate the productDelegate tasks to a built-in AI assistant inside the product

    nonemoves Built-in AIimpact 45

    The evidence shows Milvus exposes an MCP server so external AI agents can query it, but this is the reverse of the story — there is no evidence of a built-in AI assistant inside Milvus itself that a user can delegate tasks to.

  2. Automation depth — how much of the product can run unattendedDefine rules that trigger actions automatically on events

    nonemoves PA Scoreimpact 30

    Missing: any documentation of event-driven triggers, webhook/callback mechanisms, or rule-based automation tied to database events.

  3. Privacy posture — data-handling and privacy storiesPrevent my data from being used to train AI models

    nonemoves PA Scoreimpact 30

    The evidence pack contains no explicit privacy/data-usage policy addressing whether Milvus or its cloud offering (Zilliz) uses customer data to train AI models.

  4. Agenticness — how well agents can access and operate the productGet AI-generated insights and suggestions from my data inside the product

    nonemoves Built-in AIimpact 30

    Milvus documentation shows it as a vector search/database engine with MCP-based natural-language query access, but there is no evidence of Milvus itself generating insights, summaries, or suggestions from stored data — it only enables external AI apps to query it, not to produce insights inside the product.

  5. Agenticness — how well agents can access and operate the productUse an official CLI

    nonemoves agent-readyimpact 30

    Missing: any mention of a dedicated Milvus CLI, its command set, installation, or documentation.

  6. Agenticness — how well agents can access and operate the productSubscribe to events via webhooks

    nonemoves agent-readyimpact 30

    No evidence anywhere in the pack of Milvus offering webhooks or an event subscription mechanism; it's a vector database with client SDKs, MCP integration, and RBAC, but nothing about outbound event notifications or webhook subscriptions.

  7. Agenticness — how well agents can access and operate the productExplore an interactive API reference with runnable examples

    nonemoves API qualityimpact 30

    There is no evidence of an interactive API reference (e.g., Swagger/OpenAPI explorer, runnable code sandbox) — the openapi probe explicitly returned 404s at all candidate paths, and documentation consists of static markdown code snippets rather than an interactive, runnable reference.

  8. Agenticness — how well agents can access and operate the productDownload a machine-readable API spec (OpenAPI or equivalent)

    nonemoves API qualityimpact 30

    The evidence pack shows explicit probes for an OpenAPI/swagger spec on Milvus's site returning 404 for all candidate paths, and no documentation snippet references a downloadable machine-readable API spec (Milvus docs focus on SDK usage, MCP server, RBAC, multi-tenancy, etc.).

Showing the top 8 of 32 — every none/partial verdict in the story verdicts table is headroom.

Think a verdict is wrong? Every verdicts-table row has a Flag link — see the methodology.

Coverage map — which docs area, API section, or community source covers which judged storiesCoverage map4 surfaces · 30 covered stories

Where the cited evidence behind each covered verdict came from — the same citations the verdicts table shows, no extra judging.

GitHub README28 stories

Probe proofs — replayable recordings from the probe harnessProbe proofs

Replayable recordings from our probe harness — see the Prove-It protocol to submit one.

$python3 -c 'from pymilvus import MilvusClient; c = MilvusClient("/tmp/pa-milvus-probe.db"); c.create_collection("pa_probe", dimension=8); print("PA_PROBE_OK", c.list_collections())'reproduced
$ python3 -c 'from pymilvus import MilvusClient; c = MilvusClient("/tmp/pa-milvus-probe.db"); c.create_collection("pa_probe", dimension=8); print("PA_PROBE_OK", c.list_collections())'
PA_PROBE_OK ['pa_probe']

Claims vs evidence — vendor claims reconciled against independent verdictsClaims vs evidence

7 of 14 testable claims verified · 2 contradictedintegrity 21/100

16 distinct capability claims found in Milvus’s own claimed-docs/GitHub materials, reconciled against our judge’s independent verdicts.

7

Verified

5

Unverified

2

Contradicted

17

Undersold

Verified (10)
Unverified (5)
Contradicted (2)
Undersold (17)
Claims outside our story set (1)

Real capability claims found in Milvus’s own materials, but no story in this arena’s taxonomy covers them yet — that’s feedback on the taxonomy, not a mark against the product.

  • Supports a Standalone deployment mode for single-machine setups

    source ↗
Suggest a story for these →

Pricing signals

  • $63per 1M vectors/monthpay-as-you-goPerformance-optimized dedicated cluster ratesource ↗as of 2026-09-07
  • $16per 1M vectors/monthpay-as-you-goCapacity-optimized dedicated cluster ratesource ↗as of 2026-09-07
  • $5per 1M vectors/monthpay-as-you-goTiered-storage dedicated cluster ratesource ↗as of 2026-09-07
  • $126per GB-monthpay-as-you-goStandard plan dedicated rate per GB of storagesource ↗as of 2026-09-07
  • $197per month (entry plan)entry planEnterprise plan starting dedicated pricesource ↗as of 2026-09-07
  • freeper GB-monthfree tierFree tier includes 5 GB storage and 2.5M vCUs per month at no costsource ↗as of 2026-09-07

Extracted verbatim from the vendor’s own pricing page — hover a figure for the exact quote.

Business model

open-sourcefree-tierusage-basedenterprise-custom

Apache-2.0 open-source vector database under LF AI & Data, free to self-host from laptop (Milvus Lite) to cluster; Zilliz Cloud sells the managed version with free, serverless, and dedicated tiers.

pricing ↗

Score trend

How this product’s scores have moved as evidence and verdicts are re-derived — a point per change, not per day.

PA Score36 (Sep 4 '26)36 (Sep 15 '26)
Agent-ready58 (Sep 4 '26)58 (Sep 15 '26)

Try Experimental

Run it in the microterminal →

Recorded agent sessions — and a live MCP handshake where the vendor ships one.

Flag

⚑ Flag a verdict

Think a verdict is wrong? Opens a prefilled GitHub issue — or use the ⚑ next to any verdict above.

Badge

Embed this product's score badge →

Hotlinked SVG — always shows the live current score.

For agents

Data

Agent surface uptime llms.txt 100% (30d, checked every 6h since Sep 8 '26)