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Buttondown vs Refiner

Side-by-side comparison of two indie startups from the Startup Spotlight directory.

Option A
Buttondown

Buttondown

Marketing

The fastest way to start a newsletter.

Buttondown is a Markdown-first newsletter platform built by a solo founder — beloved by engineers and indie writers.

Founder
Justin Duke
Founded
2017
Team
1-10
Listing
Free (nofollow)
Listed
May 2026
View Buttondown →
Option B
Refiner

Refiner

Marketing

Customer feedback for SaaS.

Refiner is a microsurvey platform for SaaS — in-app NPS, CSAT, and PMF surveys with deep segmentation.

Founder
Jakob Knutzen
Founded
2017
Team
1-10
Listing
Free (nofollow)
Listed
May 2026
View Refiner →

See more alternatives

Buttondown alternatives →Refiner alternatives →