Nomic Embed vs Voyage AI
Both are alternatives to OpenAI Embeddings API. Here's how they stack up — verified facts, no spin.
Also searched as Voyage AI vs Nomic Embed — same comparison, one verdict.
Nomic Embed
TOP PICKThe sovereign default — Apache-2.0, runs in Ollama, 8k context.
nomic-embed-text-v1.5 is the open model that made local embeddings boring: Apache-2.0 with the training recipe published, an 8,192-token context (longer than the OpenAI API's), Matryoshka dimensions to trade size for speed, and one-command serving through Ollama on hardware you already own.
Voyage AI
The benchmark leader — hosted accuracy worth paying for.
Voyage (now part of MongoDB) tops the retrieval benchmarks: voyage-3-large leads MTEB at $0.18/1M tokens, and voyage-4-lite price-matches OpenAI's small tier at $0.02 while sharing the flagship's embedding space. The honest hosted upgrade when retrieval quality directly drives your product.
Side by side
| Nomic Embed | Voyage AI | |
|---|---|---|
| Sovereignty Score | 92 | 38 |
| Open source | Yes | No |
| Self-hostable | Yes | No |
| Local-first | Yes | No |
| License | Apache-2.0 | Proprietary hosted service |
| Pricing | Free — runs locally via Ollama or sentence-transformers; your hardware is the cost | voyage-4-lite $0.02/1M · voyage-3-large $0.18/1M tokens |
Nomic Embed is Macrostack's recommended OpenAI Embeddings API alternative, so it's our pick here.
Nomic Embed
Strengths
- +Truly open: Apache-2.0 including the training recipe
- +8,192-token context — longer than the API default
- +One-command local serving through Ollama, CPU-friendly
Trade-offs
- −English-focused — the multilingual variant is weaker
- −You own the serving and monitoring
- −Benchmark ceiling sits below the premium hosted models
Voyage AI
Strengths
- +Best measured retrieval quality on MTEB
- +Strong on code and technical documents
- +Lite tier price-matches OpenAI's small
Trade-offs
- −Hosted only — your corpus leaves your infrastructure
- −MongoDB-owned roadmap
- −Flagship pricing is the category's highest
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Facts verified 2026-07-19. Licenses and pricing change — spotted something out of date? That's a correction we want.