Tools · Comparison

NotebookLM vs OpenSEO vs Perplexity Labs

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

	NotebookLM	OpenSEO	Perplexity Labs
What it is	Grounds a model entirely in documents you upload, and will read the result back as a two-host podcast.	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	Freemium · Free · Pro via Google AI plans	Freemium	Paid · Included with Perplexity Pro $20/mo
How it bills	Free	Not published	Bundled
Free tier	Yes	Yes	No
Rating	Not yet rated	Not yet rated	Not yet rated
Features	Answers grounded strictly in your sources Citations to the exact passage Audio Overview podcast generation Study guides and briefing documents Large upload allowance	—	Multi-minute research runs Report, spreadsheet and app outputs Charts generated from findings Citations throughout Shareable results
What works	Does not wander outside your documents Citations make checking easy Audio Overviews are genuinely useful	—	Produces a usable artefact, not just text Well cited Good at breadth-first research
What does not	Cannot reason beyond the sources given Upload limits on the free tier Audio hosts have a fixed style	—	Requires a Pro subscription Slow by design Depth varies by topic