How many companies use Substack vs Tumblr?

359 companies use Substack and 87 companies use Tumblr in our database. Substack is more widely adopted with 4.1x more companies than Tumblr.

Can I get a list of companies using both Substack and Tumblr?

Yes. AgentData tracks companies using both tools. Sign up free to access the full list with emails, tech stacks, and contacts via CSV or API.

Substack is used by 359companies — 4.1x more than Tumblr (87).

359 use Substack87 use Tumblr

	Substack	Tumblr
Companies	359	87
Category	Blogs	Blogs

Get the full comparison

446 companies with emails, tech stacks, and contacts

1,000 lookups · API access · CSV exports

API access

GET /api/v1/tech?name=substack

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