Tools · Comparison

Connected Papers vs OpenSEO vs Perplexity Labs

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

	Connected Papers	OpenSEO	Perplexity Labs
What it is	A unique, visual tool to help researchers and applied scientists find and explore papers relevant to their field of work.	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.	Runs a longer research task and returns a report, a spreadsheet or a small app rather than an answer.
Category	Research	Research	Research
Pricing	Paid	Freemium	Paid · Included with Perplexity Pro $20/mo
How it bills	Not published	Not published	Bundled
Free tier	No	Yes	No
Rating	Not yet rated	Not yet rated	Not yet rated
Features	—	—	Multi-minute research runs Report, spreadsheet and app outputs Charts generated from findings Citations throughout Shareable results
What works	Sits in Research, one of the better-covered categories here — easy to compare	—	Produces a usable artefact, not just text Well cited Good at breadth-first research
What does not	No free tier — it has to be paid for before it can be tried Does not publish a price on its own site, so the cost is only clear after signing up 44 other tools in this catalogue claim to do the same job 12 tools in the same category have a free tier	—	Requires a Pro subscription Slow by design Depth varies by topic