Ai2
Truly open breakthrough AI.
VS
Perplexity AI
AI-powered answer engine for real-time, cited information and advanced research.
Detailed comparison
Criteria
Ai2
Perplexity AI
Pricing
Free
Freemium
Plans & pricing
Semantic Scholar: Free, AutoDiscovery (AstaLabs) Trial: Free, Olmo 2 32B Instruct API: Custom, Olmo 3 7B Think API: Custom, Olmo 3 7B Instruct API: Custom, Olmo 3 32B Think API: Custom, Olmo 3.1 32B Think API: Custom, Olmo 3.1 32B Instruct API: Custom
Free Plan: Free, Perplexity Pro: $16.67/mo, Education Pro: $10/mo, Perplexity Max: $166.67/mo, Perplexity Enterprise Pro: $33.33/mo, Perplexity Enterprise Max: $270.83/mo, API Pricing: Custom
Free trial
Yes
No
Audience
b2b
b2c
Platforms
Web
Web
API
Yes
No
Open Source
Open Source
Proprietary
Categories
Education, Research
Specialized Technologies, information technology & services, Search engine
Popularity
Very High
Very High
Description
Ai2, founded by Paul Allen and led by Ali Farhadi, is a non-profit research institute. It conducts high-impact research and engineering to tackle key ...
Perplexity AI is a research-oriented answer engine that integrates large language models with live web search, transparent citations, document analysi...
Pricing
Ai2
Free
Perplexity AI
Freemium
Plans & pricing
Ai2
Semantic Scholar: Free, AutoDiscovery (AstaLabs) Trial: Free, Olmo 2 32B Instruct API: Custom, Olmo 3 7B Think API: Custom, Olmo 3 7B Instruct API: Custom, Olmo 3 32B Think API: Custom, Olmo 3.1 32B Think API: Custom, Olmo 3.1 32B Instruct API: Custom
Perplexity AI
Free Plan: Free, Perplexity Pro: $16.67/mo, Education Pro: $10/mo, Perplexity Max: $166.67/mo, Perplexity Enterprise Pro: $33.33/mo, Perplexity Enterprise Max: $270.83/mo, API Pricing: Custom
Free trial
Ai2
Yes
Perplexity AI
No
Audience
Ai2
b2b
Perplexity AI
b2c
Platforms
Ai2
Web
Perplexity AI
Web
API
Ai2
Yes
Perplexity AI
No
Open Source
Ai2
Open Source
Perplexity AI
Proprietary
Categories
Ai2
Education, Research
Perplexity AI
Specialized Technologies, information technology & services, Search engine
Popularity
Ai2
Very High
Perplexity AI
Very High
Description
Ai2
Ai2, founded by Paul Allen and led by Ali Farhadi, is a non-profit research institute. It conducts high-impact research and engineering to tackle key ...
Perplexity AI
Perplexity AI is a research-oriented answer engine that integrates large language models with live web search, transparent citations, document analysi...
Features
Ai2
Open language models (OLMo)
Multimodal AI models
AI for science applications (Asta)
Semantic scientific search (Semantic Scholar)
AI for environmental applications (EarthRanger)
AI model evaluation frameworks
Perplexity AI
Real-time answers with cited sources
Perplexity Computer for autonomous, multi-model AI workflows
Access to advanced AI models (GPT-5.1, Claude Opus 4.5, o3-pro, etc.)
File upload and analysis (PDFs, spreadsheets, reports)
Comet AI-native browser for integrated web assistance
Focus Modes for targeted searches (Web, Academic, Social, Health, Finance)
Key differentiators
Ai2
- Non-profit AI research for common good
- Develops truly open AI models
- Specializes in AI for science & environment
Perplexity AI
- Real-time answers with cited sources
- Agentic AI workflows (Perplexity Computer)
- Document analysis & specialized focus modes
Other comparisons
FAQ: Ai2 vs Perplexity AI
Ai2: Truly open breakthrough AI.. Perplexity AI: AI-powered answer engine for real-time, cited information and advanced research.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. Ai2 is free and Perplexity AI is freemium.
The best choice between Ai2 and Perplexity AI depends on your specific needs. Compare their features, pricing, and target audience on this page to find the tool that best fits your use case.
Ai2 is primarily designed for individuals, while Perplexity AI is built for individuals.
Ai2 offers: Open language models (OLMo), Multimodal AI models, AI for science applications (Asta), Semantic scientific search (Semantic Scholar). Perplexity AI offers: Real-time answers with cited sources, Perplexity Computer for autonomous, multi-model AI workflows, Access to advanced AI models (GPT-5.1, Claude Opus 4.5, o3-pro, etc.), File upload and analysis (PDFs, spreadsheets, reports).
Based on our data, Perplexity AI currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.