# Epsilla vs Faiss

| Attribute | Epsilla | Faiss |
|---|---|---|
| **vioscaleAI score** | 65.3 (29% (low)) | 57 (35% (low)) |
| activity.commits_last_30d | - | 66 |
| adoption.dependent_repos | - | 5,592 |
| adoption.github_stars | - | 41,146 |
| content.faq | `[{"answer":"A platform that simplifies building AI agents and knowledge-base systems for teams of any technical level. It provides enterprise-grade multi-tenancy and supports flexible deployment modes including cloud, on-premise, and private cloud. It is indexed under Vector Databases.","source":"https://epsilla.com","question":"What is Epsilla?","confidence":0.6},{"answer":"Epsilla offers a free tier, so you can start without paying. Paid plans start at $29 per month. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.","source":"https://epsilla.com","question":"Is Epsilla free?","confidence":0.6},{"answer":"We have confirmed browser-based access to Epsilla. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://epsilla.com","question":"What platforms does Epsilla support?","confidence":0.6},{"answer":"Yes. Epsilla can be deployed cloud / SaaS, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://epsilla.com","question":"Can Epsilla be self-hosted?","confidence":0.6}]` | `[{"answer":"Faiss is a library for efficient similarity search and clustering of dense vectors. It contains algorithms that search in sets of vectors of any size, up to ones that possibly do not fit in RAM. It is indexed under Vector Databases.","source":"https://faiss.ai","question":"What is Faiss?","confidence":0.6},{"answer":"Faiss is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.","source":"https://faiss.ai","question":"Is Faiss free to use?","confidence":0.6},{"answer":"Faiss supports Windows, macOS and Linux. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://faiss.ai","question":"What platforms does Faiss support?","confidence":0.6},{"answer":"Yes. Faiss can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://faiss.ai","question":"Can Faiss be self-hosted?","confidence":0.6},{"answer":"Yes. Faiss is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/facebookresearch/faiss","question":"Is Faiss open source?","confidence":0.95}]` |
| deployment.options | `{"cloud":true,"on_prem":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | A platform that enables teams to build and deploy AI applications by combining language models with searchable knowledge repositories. It simplifies the setup and management of retrieval-augmented generation workflows without requiring technical engineering. | Faiss is a library for efficient similarity search and clustering of dense vectors. It contains algorithms that search in sets of vectors of any size, up to ones that possibly do not fit in RAM. |
| features.capabilities | `{"deployment":"managed","serverless":true,"licence_class":"proprietary","multi_tenancy":true,"product_class":"parent_feature"}` | `{"ann_index":"HNSW, IVF, PQ, multi-index, NSG","deployment":"self_hosted","serverless":false,"quantization":"product","storage_tier":"disk_backed","licence_class":"permissive_oss","product_class":"extension","distance_metrics":"Euclidean (L2), inner product, L1, Linf","horizontal_scale":"single_node"}` |
| language.primary | - | C++ |
| license.spdx | - | MIT |
| platform.support | `{"web":true}` | `{"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"subscription","plans":[{"free":true,"name":"Free Tier","summary":"Free","features":["1 Team Member","1 Project","1 AI Application","1 Knowledge Base","10M Vector Storage","50 Messages/Month (Powered by GPT-4.1)","Community Support","Data Cleared after 30 Days of Inactivity"],"minSeats":1,"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"contactSales":false,"includedLimits":{"messages":"50/month","projects":"1","team_members":"1","vector_storage":"10M","ai_applications":"1","knowledge_bases":"1"}},{"free":false,"name":"Starter Tier","summary":"$29/month","features":["2 Team Members","1 Project","5 AI Applications","5 Knowledge Bases","1G Vector Storage","500 Messages/Month (Powered by GPT-4.1)","Email Support"],"minSeats":2,"commitment":"monthly","components":[{"kind":"fixed","amount":29,"period":"month","currency":"USD"}],"contactSales":false,"includedLimits":{"messages":"500/month","projects":"1","team_members":"2","vector_storage":"1G","ai_applications":"5","knowledge_bases":"5"}},{"free":false,"name":"Professional Tier","summary":"$249/month","features":["20 Team Members","10 Projects","50 AI Applications","50 Knowledge Bases","10G Vector Storage","5000 Messages/Month (Powered by GPT-4.1)","Dedicated Support Channel","AI Concierge"],"minSeats":20,"commitment":"monthly","components":[{"kind":"fixed","amount":249,"period":"month","currency":"USD"}],"contactSales":false,"includedLimits":{"messages":"5000/month","projects":"10","team_members":"20","vector_storage":"10G","ai_applications":"50","knowledge_bases":"50"}},{"free":false,"name":"AI Concierge","summary":"$2,499/month","features":["Everything in Professional","Fractional Forward Deployed AI Engineer","Done-For-You AI Agent & Workflow Build-Out","Domain-to-AI Enablement","Weekly Strategy & Review Calls","Custom Integration Support","Priority Support Channel","Ongoing Optimization"],"commitment":"monthly","components":[{"kind":"fixed","amount":2499,"period":"month","currency":"USD"}],"description":"Includes fractional forward deployed AI engineer from Epsilla team","contactSales":false},{"free":false,"name":"Enterprise Tier","summary":"Custom pricing","features":["Unlimited Team Members","Unlimited Projects","Unlimited AI Applications","Unlimited Knowledge Bases","Unlimited Vector Storage","Unlimited Messages/Month (any LLM Provider)","Extensive White-Labeling","SSO (SAML and OIDC)","On-Prem Deployment Options","Consulting and Customization","Premium Support with SLAs"],"contactSales":true,"includedLimits":{"messages":"Unlimited","projects":"Unlimited","team_members":"Unlimited","vector_storage":"Unlimited","ai_applications":"Unlimited","knowledge_bases":"Unlimited"}}],"addOns":[{"name":"Team Member","components":[{"kind":"per_unit","unit":"seat","amount":12,"period":"month","currency":"USD"}]},{"name":"AI Application","components":[{"kind":"per_unit","unit":"application","amount":2,"period":"month","currency":"USD"}]},{"name":"Knowledge Base","components":[{"kind":"per_unit","unit":"database","amount":2,"period":"month","currency":"USD"}]},{"name":"Vector Storage","components":[{"per":{"qty":1,"unit":"GB"},"kind":"metered","amount":18,"period":"month","currency":"USD"}]},{"name":"Messages","components":[{"per":{"qty":100,"unit":"messages"},"kind":"metered","amount":3,"period":"month","currency":"USD"}]},{"name":"Remove \"Powered By Epsilla\"","components":[{"kind":"fixed","amount":39,"period":"month","currency":"USD"}]}],"summary":"Free tier through $2,499/month. Custom pricing for Enterprise. Metered add-ons $2–39/month.","currency":"USD","freeTier":true,"sourceUrl":"https://epsilla.com","retrievedAt":"2026-08-03T13:12:38.383Z","startingPrice":{"amount":29,"period":"month","currency":"USD"},"billingPeriods":["month","year"]}` | `{"type":"open_source","sourceUrl":"https://faiss.ai","retrievedAt":"2026-08-13T20:46:34.341Z"}` |
| pricing.free_tier | yes | - |
| pricing.model | freemium | commercial |
| pricing.price_level | mid | free |
| pricing.transparent | yes | - |
| release.cadence_days | - | 83 |
| release.history | - | `[{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.15.1","date":"2026-09-16T19:24:02Z","type":"stable","version":"v1.15.1"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.15.0","date":"2026-08-03T17:10:58Z","type":"stable","version":"v1.15.0"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.14.3","date":"2026-06-13T04:03:53Z","type":"stable","version":"v1.14.3"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.14.2","date":"2026-05-22T20:05:00Z","type":"stable","version":"v1.14.2"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.14.1","date":"2026-03-06T17:49:04Z","type":"stable","version":"v1.14.1"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.14.0","date":"2026-03-03T03:19:33Z","type":"stable","version":"v1.14.0"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.13.2","date":"2025-12-19T23:41:59Z","type":"stable","version":"v1.13.2"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.13.1","date":"2025-12-03T00:02:15Z","type":"stable","version":"v1.13.1"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.13.0","date":"2025-11-12T17:18:44Z","type":"stable","version":"v1.13.0"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.12.0","date":"2025-08-12T16:46:55Z","type":"stable","version":"v1.12.0"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.11.0","date":"2025-04-25T14:13:55Z","type":"stable","version":"v1.11.0"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.10.0","date":"2025-01-31T23:29:10Z","type":"stable","version":"v1.10.0"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.9.0","date":"2024-10-04T21:33:29Z","type":"stable","version":"v1.9.0"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.8.0","date":"2024-03-01T01:04:25Z","type":"stable","version":"v1.8.0"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.7.4","date":"2023-04-20T13:45:29Z","type":"stable","version":"v1.7.4"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.7.3","date":"2022-11-30T15:24:12Z","type":"stable","version":"v1.7.3"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.7.2","date":"2022-01-10T12:19:49Z","type":"stable","version":"v1.7.2"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.7.1","date":"2021-05-28T09:08:34Z","type":"stable","version":"v1.7.1"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.7.0","date":"2021-02-13T14:11:25Z","type":"stable","version":"v1.7.0"},{"url":"https://github.com/facebookresearch/faiss/releases/tag/v1.6.5","date":"2020-12-21T05:24:03Z","type":"stable","version":"v1.6.5"}]` |
| reliability.sla_pct | 99.9 | - |
| reliability.status_page | yes | yes |
| security.scorecard | - | 6.2 |
| security.vulnerabilities | - | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=faiss-cpu&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Vector Databases)

| Capability | Epsilla | Faiss |
|---|:--:|:--:|
| **Deployment** |  |  |
| Deployment | Managed | Self-hosted |
| Serverless / consumption pricing | ✓ | ✗ |
| **Index** |  |  |
| ANN index (HNSW / IVF / DiskANN / ScaNN / flat) | - | HNSW, IVF, PQ, multi-index, NSG |
| Distance metrics (cosine / dot / Euclidean) | - | Euclidean (L2), inner product, L1, Linf |
| **Query** |  |  |
| Metadata filtering | - | - |
| Hybrid search (dense + sparse fusion) | - | - |
| Built-in BM25 / lexical | - | - |
| **Storage** |  |  |
| Quantization | - | Product |
| On-disk vs in-memory | - | Disk-backed |
| **Scale** |  |  |
| Multi-tenancy (namespaces / collections / tenants) | ✓ | - |
| Horizontal scale | - | Single-node |
| **Consistency** |  |  |
| Consistency | - | - |
| **Licensing** |  |  |
| Licence class | Proprietary | Permissive OSS |
| **Classification** |  |  |
| Purpose-built vs feature-of-parent | Feature of parent | Extension |

*Source: vioscaleAI. Generated 2026-10-16T20:58:21.802Z. "-" = undocumented, not absent.*