Sejda earned its reputation by having the most generous free tier in the category and not putting a watermark on anything.
Flint takes a different angle: lighter editor, day pass. Here is the honest comparison.
Where Sejda wins
Generous free tier — three tasks per hour, plus file size up to 200 pages or 50MB. No watermark. Strong basic editor with form filling. If your usage is genuinely occasional, Sejda may cover it free.
Where Flint wins
Modern UX. Edit-pdf, sign-pdf, merge-pdf, redact-pdf, convert-pdf all sit in one editor. Day pass for one-off heavy work. Cleaner pricing page.
Pricing compared
Sejda Premium is around $7.50/month annual. Flint Pro is competitive on annual and adds a day pass. For genuinely-free occasional use, Sejda is hard to beat.
Best for…
Sejda for occasional use that fits inside the free tier. Flint for a cleaner modern editor with day-pass flexibility.
FAQ
Does Sejda watermark files?
No watermark on output. The free tier caps tasks per hour and file size.
Which is faster?
Flint's editor is more responsive. Sejda is fine for simple tasks.
Can I trust both with private docs?
Yes — both use encrypted upload and short retention.
Sejda is a fine free option. If you find yourself bumping the cap, try Flint with a day pass before committing to anything monthly.