Haystack vs Vercel AI SDK
Both are Grade A and 2.6 points apart, so choose on what you weigh most. Haystack leads on supply-chain integrity and transparency; Vercel AI SDK leads on adoption and rests on broader evidence. Note: Haystack's evidence coverage is thinner (coverage B vs A) — its score rests on fewer independent signal types.
Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Built for scalable agents, RAG, multimodal applications, semantic search…
Choose Haystack if supply-chain integrity and transparency matter most.
- +4.4Safety / Integrity: OSSF Scorecard 9.4 against 5.8
- +3.1Transparency: OSSF Scorecard 9.4 against 5.8
The AI Toolkit for TypeScript. From the creators of Next.js, the AI SDK is a free open-source library for building AI-powered applications and agents
Choose Vercel AI SDK if adoption matters most.
- +2.7Adoption: 31.2M weekly downloads against 108.8k
- A vs BEvidence coverage: 4 of 5 independent signal types, against 3
Where they differ
2 dimensions identical: Identity 18.0 · Maintenance 19.9 · Full evidence table
An independent, evidence-based trust comparison of Haystack and Vercel AI SDK, two Agent Frameworks projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.
Full evidence
| Signal | Haystackdeepset-ai/haystack | Vercel AI SDKvercel/ai |
|---|---|---|
| HVTrust score | 96.4 | 93.8 |
| Evidence grade | A | A |
| Coverage grade | B | A |
| Overall rank | #1 | #6 |
| Rank in Agent Frameworks | #1 | #4 |
| GitHub stars | 26.8k | 27.4k |
| Last updated | 1d ago | 1d ago |
| Build provenance | Yes | Yes |
| OSSF Scorecard | 9.4 / 10 | 5.8 / 10 |
| License | Apache-2.0 | NOASSERTION |
| Downloads | 109k/wk | 31.2M/wk |
| Trust dimensions (points earned) | ||
| Safety / integrity / 25 | 24.2 | 19.8 |
| Identity & provenance / 18 | 18.0 | 18.0 |
| Transparency / 17 | 16.5 | 13.4 |
| Maintenance / 20 | 19.9 | 19.9 |
| Adoption / 20 | 17.3 | 20.0 |
| Runtime capability surface (full matrix) | ||
| MCP server | Declared | Implemented |
| External providers | 1 — OpenAI | 1 — OpenAI |
| Requires API keys | No | No |
| Plugin surface | plugins | — |
| Provenance drift | Match | Match |
How to read this: HVTrust (0–100) weighs supply-chain signals (provenance, OSSF Scorecard, signed commits, open license) alongside real-world adoption, scaled by an evidence-confidence factor. Grade bands: A ≥ 80, B ≥ 65, C ≥ 50, D < 50. Signals refresh daily. Full methodology v4.4 →