# Mixedbread (mxbai) vs sentence-transformers

**Leader by Vioscale score:** Mixedbread (mxbai)

| Attribute | Mixedbread (mxbai) | sentence-transformers |
|---|---|---|
| **Vioscale score** | 73.8 (35% (low)) | 56 (32% (low)) |
| activity.commits_last_30d | - | 100 |
| adoption.dependent_repos | - | 5,182 |
| adoption.github_stars | - | 19,036 |
| deployment.options | `{"cloud":true,"hybrid":true,"on_prem":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | A search and retrieval platform that indexes and queries text, images, PDFs, video, and audio across over 100 languages with minimal latency, requiring no infrastructure management or manual embedding configuration. | Python toolkit for generating semantic embeddings from text, images, audio, and video using transformer-based neural networks. Supports dense embedding models, cross-encoder rerankers for scoring and ranking, and late-interaction multi-vector models for advanced retrieval tasks. |
| features.capabilities | `{"soc2_type_ii":true,"pricing_model":"per_million_tokens_api","architecture_model":"hybrid","cross_encoder_reranker_api_offered":true,"multi_modal_image_and_text_joint_embeddings":true,"multilingual_support_across_100_plus_languages":true}` | `{"pricing_model":"free_open_weights","architecture_model":"open_weights_local","cross_encoder_reranker_api_offered":true,"late_interaction_architecture_colbert_v2":true,"multi_modal_image_and_text_joint_embeddings":true}` |
| integrations.count | - | 1 |
| integrations.list | - | `[{"name":"Hugging Face Hub"}]` |
| language.primary | - | Python |
| license.spdx | - | Apache-2.0 |
| market.availability | `{"hqCountry":"US","primaryMarkets":["US"],"availabilityScope":"regional","availableCountries":["US"],"notAvailableCountries":[]}` | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true}` | - |
| pricing | `{"type":"hybrid","plans":[{"free":true,"name":"Starter","summary":"Free with $5 one-time credits","features":["$5 one-time credits","3 workspace users","10 stores","100 requests/minute","Community Slack support"],"minSeats":3,"components":[{"kind":"one_time","amount":5,"currency":"USD"}],"description":"Free tier with included credits and basic limits","contactSales":false,"includedLimits":{"stores":"10","requests_per_minute":"100"}},{"free":false,"name":"Scale","summary":"$20/month plus usage-based pricing","features":["$20/month in included credits","Unlimited workspace users","10,000 stores","1,200 queries/min, 360 ingestion/min","Automatic backups","Priority Slack support (same-day SLA)"],"commitment":"monthly","components":[{"kind":"fixed","amount":20,"period":"month","currency":"USD"},{"per":{"qty":1,"unit":"million input tokens"},"kind":"metered","amount":0.3,"currency":"USD"},{"per":{"qty":1,"unit":"million output tokens"},"kind":"metered","amount":0.72,"currency":"USD"}],"description":"Monthly subscription with higher capacity and priority support","contactSales":false,"includedLimits":{"stores":"10,000","workspace_users":"Unlimited","queries_per_minute":"1,200","ingestion_per_minute":"360"}},{"free":false,"name":"Enterprise","summary":"Custom pricing with volume discounts","features":["Volume-based discounts","Unlimited stores","Custom rate limits & SLA","Automatic backups with point-in-time recovery","Dedicated support team"],"description":"Custom plan with volume pricing and dedicated support","contactSales":true,"includedLimits":{"sla":"Custom","stores":"Unlimited","rate_limits":"Custom"}}],"addOns":[{"name":"Startup Credits Program"}],"summary":"From $20/month plus per-token API usage. Free tier available with $5 credits.","currency":"USD","freeTier":true,"sourceUrl":"https://www.mixedbread.com/pricing","retrievedAt":"2026-08-25T21:46:40.403Z","startingPrice":{"amount":20,"period":"month","currency":"USD"},"billingPeriods":["month"]}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://www.sbert.net","retrievedAt":"2026-08-21T11:02:44.703Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | open_source |
| pricing.price_level | mid | free |
| pricing.starting_price | `{"amount":20,"currency":"USD"}` | - |
| pricing.transparent | yes | yes |
| release.cadence_days | - | 27 |
| release.history | - | `[{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v6.0.0","date":"2026-08-18T13:46:07Z","type":"stable","version":"v6.0.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.7.0","date":"2026-08-06T12:12:42Z","type":"stable","version":"v5.7.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.6.1","date":"2026-07-23T14:42:08Z","type":"stable","version":"v5.6.1"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.6.0","date":"2026-06-16T14:02:15Z","type":"stable","version":"v5.6.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.5.1","date":"2026-05-20T07:37:38Z","type":"stable","version":"v5.5.1"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.5.0","date":"2026-05-12T14:06:38Z","type":"stable","version":"v5.5.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.4.1","date":"2026-04-14T13:35:25Z","type":"stable","version":"v5.4.1"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.4.0","date":"2026-04-09T13:41:49Z","type":"stable","version":"v5.4.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.3.0","date":"2026-03-12T14:54:11Z","type":"stable","version":"v5.3.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.2.3","date":"2026-02-17T14:06:18Z","type":"stable","version":"v5.2.3"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.2.2","date":"2026-01-27T11:11:19Z","type":"stable","version":"v5.2.2"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.2.1","date":"2026-01-26T14:48:31Z","type":"stable","version":"v5.2.1"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.2.0","date":"2025-12-11T14:12:37Z","type":"stable","version":"v5.2.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.1.2","date":"2025-10-22T13:00:25Z","type":"stable","version":"v5.1.2"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.1.1","date":"2025-09-22T11:28:54Z","type":"stable","version":"v5.1.1"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.1.0","date":"2025-08-06T13:49:08Z","type":"stable","version":"v5.1.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.0.0","date":"2025-07-01T13:56:10Z","type":"stable","version":"v5.0.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v4.1.0","date":"2025-04-15T13:47:13Z","type":"stable","version":"v4.1.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v4.0.2","date":"2025-04-03T11:29:10Z","type":"stable","version":"v4.0.2"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v4.0.1","date":"2025-03-26T14:59:03Z","type":"stable","version":"v4.0.1"}]` |
| security.iso27001 | yes | - |
| security.soc2 | yes | - |
| security.vulnerabilities | - | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=sentence-transformers&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Embeddings Apis)

| Capability | Mixedbread (mxbai) | sentence-transformers |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Architecture model | Hybrid | Open weights local |
| Matryoshka representation learning for dimension truncation | - | - |
| Multilingual support across 100 plus languages | ✓ | - |
| Binary and scalar quantization for memory reduction | - | - |
| Cross encoder reranker API offered | ✓ | ✓ |
| Late interaction architecture colbert v2 | - | ✓ |
| Massive context window greater than 8k tokens | - | - |
| Multi modal image and text joint embeddings | ✓ | ✓ |
| Task specific prefixes query vs document instructions | - | - |
| Zero data retention training opt out enterprise | - | - |
| SOC2 type ii | ✓ | - |
| Mit or apache permissive oss license | - | - |
| Pricing model | Per million tokens API | Free open weights |

*Source: Vioscale. Generated 2026-09-01T15:18:37.297Z. "-" = undocumented, not absent.*