Best free Boltz alternatives

Looking for a free alternative to Boltz? Here are 9 science & research ai worth trying — 9 with a free tier. Boltz itself is free.

ToolBoltz (you searched)AlphaFold ServerChai-1 (Chai Discovery)Kosmos (Edison Scientific / FutureHouse)
Pricingfreefreefreemiumfreemium
Best forFirst fully open-source model to approach AlphaFold3-level structure prediction, MIT-licensedFree browser-based access to AlphaFold 3-class structure prediction for non-commercial researchChai-1 is free, Apache-2.0-licensed for academic and commercial use — a genuinely open structure-prediction modelAutonomous AI agent that runs literature review + data analysis cycles, condensing ~6 months of research into a day per vendor
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Boltz alternatives — straight answers

What is the best free alternative to Boltz?

AlphaFold Server is the closest free alternative to Boltz: same Science & Research AI sub-category, and it is free. Free browser-based access to AlphaFold 3-class structure prediction for non-commercial research

Are there free Boltz alternatives?

Yes — 9 of the 9 alternatives listed here are free or freemium: AlphaFold Server, Chai-1 (Chai Discovery), Kosmos (Edison Scientific / FutureHouse), Scira, Morphic. None of them are paid-only.

Is Boltz free?

Boltz is free. There is no paid plan attached to it in the catalog.

How were these Boltz alternatives chosen?

They are the other tools in Science & Research AI, then the rest of Research & Learning, ordered free tiers first and capped at 9. There is no sponsorship and no paid placement in that ordering — only the pricing tier decides.

All Boltz alternatives

Browse Science & Research AI →

AlphaFold Server

Science & Research AI
free

✦ WhyA Boltz alternative — Free browser-based access to AlphaFold 3-class structure prediction for non-commercial research.

  • Free browser-based access to AlphaFold 3-class structure prediction for non-commercial research
  • Predicts structure/interactions of proteins, DNA, RNA, ligands in one model
  • Backed by the AlphaFold Protein Structure Database of 200M+ predicted structures
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Chai-1 (Chai Discovery)

Science & Research AI
freemium

✦ WhyA Boltz alternative — Chai-1 is free, Apache-2.0-licensed for academic and commercial use — a genuinely open structure-prediction model.

  • Chai-1 is free, Apache-2.0-licensed for academic and commercial use — a genuinely open structure-prediction model
  • Chai-2 (paid, enterprise) generates de novo antibodies directly from target epitopes, used by Lilly, Novartis, Pfizer
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freemium

✦ WhyA Boltz alternative — Autonomous AI agent that runs literature review + data analysis cycles, condensing ~6 months of research into a day per vendor.

  • Autonomous AI agent that runs literature review + data analysis cycles, condensing ~6 months of research into a day per vendor
  • Publicly available via web interface and API, not an internal-only research demo
  • Generous free tier committed by Edison Scientific, the commercial spinout now running the platform
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Scira

AI Search & Answer Engines
free

✦ WhyA Boltz alternative — Free, no credit card required.

  • Free, no credit card required
  • Open-source (git.new/scira)
  • Multi-mode search: web, Reddit, academic papers, video, fact-check
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Morphic

AI Search & Answer Engines
free

✦ WhyA Boltz alternative — Open-source, Apache 2.0, self-hostable generative-UI search engine.

  • Open-source, Apache 2.0, self-hostable generative-UI search engine
  • 9k+ GitHub stars, actively maintained
  • Pluggable model (OpenAI/Anthropic/Gemini/Ollama) and search backends (Tavily/Brave/Exa)
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Perplexica

AI Search & Answer Engines
free

✦ WhyA Boltz alternative — MIT-licensed, fully self-hostable open-source Perplexity clone.

  • MIT-licensed, fully self-hostable open-source Perplexity clone
  • Runs with local LLMs via Ollama or cloud providers
  • Uses SearxNG for private, ad-free web search
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STORM (Stanford)

Deep Research & Documents
free

✦ WhyA Boltz alternative — MIT-licensed open-source system that researches a topic and writes a full cited report.

  • MIT-licensed open-source system that researches a topic and writes a full cited report
  • Perspective-guided simulated conversations to deepen research before writing
  • Co-STORM variant adds human-AI collaborative curation
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Semantic Scholar

Academic Research
free

✦ WhyA Boltz alternative — Fully free AI-powered search across 237M+ scientific papers.

  • Fully free AI-powered search across 237M+ scientific papers
  • Semantic Reader augmented-reading tool for papers
  • Free public API used by many other research tools
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ResearchRabbit

Academic Research
free

✦ WhyA Boltz alternative — Visual citation-network mapping across 310M+ papers.

  • Visual citation-network mapping across 310M+ papers
  • Zotero integration for reference management
  • Used by 1M+ researchers at Harvard/Stanford/MIT/Oxford, free to sign up
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Boltz head-to-head

Boltz vs AlphaFold ServerBoltz vs Chai-1 (Chai Discovery)Boltz vs Kosmos (Edison Scientific / FutureHouse)Boltz vs SciraBoltz vs MorphicBoltz vs PerplexicaBoltz vs STORM (Stanford)Boltz vs Semantic Scholar