Comparison

FastEmbed vs Voyage AI

On the evidence we track, FastEmbed leads this comparison with a composite score of 57/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
★FastEmbed57
Voyage AI42
Score
vioscaleAI score
FastEmbed57 / 100medium · 54%
Voyage AI42 / 100low · 37%
Pricing
Free tier
FastEmbed✓
Voyage AI–
Model
FastEmbedopen_source
Voyage AIcommercial
Price level
FastEmbedfree
Voyage AI–
Integrations
Count
FastEmbed3
Voyage AI1
Adoption
Dependent repos
FastEmbed4
Voyage AI–
Github stars
FastEmbed3,244
Voyage AI–
Activity
Commits last 30d
FastEmbed71
Voyage AI–
Release
Cadence days
FastEmbed33
Voyage AI–
History
FastEmbed20 items
Voyage AI–
License
Spdx
FastEmbedApache-2.0
Voyage AI–
Language
Primary
FastEmbedPython
Voyage AI–
Content
Faq
FastEmbed3 items
Voyage AI3 items

Capabilities

Feature-by-feature on the axes that matter for embeddings apis. “-” means undocumented, not absent.

Capabilities
Architecture model
FastEmbedOpen weights local
Voyage AIManaged cloud API
Matryoshka representation learning for dimension truncation
FastEmbed-
Voyage AI-
Multilingual support across 100 plus languages
FastEmbed✓
Voyage AI✓
Binary and scalar quantization for memory reduction
FastEmbed✓
Voyage AI-
Cross encoder reranker API offered
FastEmbed✓
Voyage AI✓
Late interaction architecture colbert v2
FastEmbed✓
Voyage AI-
Massive context window greater than 8k tokens
FastEmbed✓
Voyage AI✓
Multi modal image and text joint embeddings
FastEmbed✓
Voyage AI✓
Task specific prefixes query vs document instructions
FastEmbed✓
Voyage AI-
Zero data retention training opt out enterprise
FastEmbed-
Voyage AI-
SOC2 type ii
FastEmbed-
Voyage AI-
Mit or apache permissive oss license
FastEmbed✓
Voyage AI-
Pricing model
FastEmbedFree open weights
Voyage AI-

What each one is

The product in its own terms, so the numbers below have context.

FastEmbed

Leader

FastEmbed is a Python library that generates text and image embeddings using ONNX Runtime, eliminating the need for large PyTorch dependencies. It supports various embedding models including sparse embeddings, late-interaction models, and cross-encoders, making it suitable for serverless and resource-constrained environments.

Independently observed

Voyage AI

Voyage AI offers neural embedding and reranking models designed to enhance information retrieval and relevance ranking in systems that process large collections of unstructured text. The models are optimized for question-answering and search applications that need to find and rank relevant documents efficiently.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

FastEmbed

Leader
Open sourceFree tier
as of verify ↗

Voyage AI

Pricing not documented yet.

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Deployment
Cloud / SaaS
FastEmbed✓
Voyage AI✓
Self-hosted
FastEmbed✓
Voyage AI✓
On-premise
FastEmbed✗
Voyage AI✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

FastEmbed

Leader
3 total
  • Qdrant
  • Langchain
  • Llama Index
Independently observed

Voyage AI

3 total
  • vector databases
  • LLMs
  • MongoDB
Independently observed
Still deciding?

FastEmbed or Voyage AI: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.