Tools · Comparison

Consensus vs OpenSEO vs Perplexity AI

All three are research tools. Here is what separates them.

	Consensus	OpenSEO	Perplexity AI
What it is	Answers a yes-or-no research question by aggregating what the papers actually found.	OpenSEO is the open source alternative to Ahrefs and Semrush. Keyword research, backlinks, rank tracking, and site audits, billed by usage instead of a $100-plus monthly subscription. Self-host it free, or connect it to your AI agents over MCP.	AI-powered search engine providing accurate, sourced answers using LLMs and real-time web search.
Category	Research	Research	Research
Pricing	Freemium · Free · from $8.99/mo	Freemium	Freemium · $20/mo
How it bills	Flat monthly	Not published	Flat monthly
Free tier	Yes	Yes	Yes
Rating	Not yet rated	Not yet rated	4.6 from 5,400 reviews
Features	Evidence-based answers from papers Consensus meter across studies Study quality indicators Citation export Filters by study type	—	Real-time web search Cited sources Pro Search deep research File analysis Image search Code execution Collections API access
What works	Shows disagreement rather than hiding it Every answer traces to papers Good free tier	—	Accurate with citations Real-time information Excellent for research Clean interface Generous free tier
What does not	Only covers questions research has addressed Consensus meter oversimplifies Field coverage is uneven	—	Pro features behind paywall Sometimes shallow answers Limited creative tasks Fewer integrations