Grammarly vs QuillBot affiliate programs
Grammarly and QuillBot are AI writing tools that both run affiliate programs. Grammarly lists $0.20 per free signup + $20 per upgrade through Impact; QuillBot lists Up to 20% through PartnerStack. Grammarly lists the longer referral cookie: 90 days against 30. aifilliate records each program from a cited vendor source and does not rank the two.
| Recorded term | Grammarly Verified | QuillBot Verified |
|---|---|---|
| Commission | $0.20 per free signup + $20 per upgrade | Up to 20% |
| Structure | One-time | Unlisted |
| Cookie window | 90 days | 30 days |
| Network | Impact | PartnerStack |
| Payout threshold | Not stated | Not stated |
| Terms checked | 2026-08-22 | 2026-08-22 |
| Source | Open source ↗ | Open source ↗ |
What matches, what differs
Differences
- Different platforms: Impact against PartnerStack, meaning two dashboards and two payout schedules.
- Grammarly lists the longer referral cookie: 90 days against 30.
In common
- Both are AI writing tools.
What these terms mean in practice
Attribution splits between day 30 and day 90. A referral who clicks today and subscribes on day 60 is still credited by Grammarly, but no longer by QuillBot.
Promoting both means two applications, two dashboards, and two payout schedules — Impact for Grammarly and PartnerStack for QuillBot, each with its own approval and its own minimum.
Which record fits which promoter
- Grammarly: suits traffic that deliberates before buying — the 90-day window still credits slow conversions.
- QuillBot: suits audiences that convert quickly; its 30-day window is shorter, so timing matters more.
What is not published
Anything below has to be confirmed with the vendor before either offer can be modelled. aifilliate records it as unknown rather than estimating it.
- Neither vendor publishes a payout threshold.
- QuillBot does not publish whether the payout recurs.
How to read these two records
These payouts do not share a basis — one is quoted as a percentage, the other as a flat amount per conversion. A percentage of an unknown plan price and a fixed bounty are not the same unit, so aifilliate does not rank them.
The payout structure is not stated for both programs. Grammarly lists the longer referral cookie: 90 days against 30.
aifilliate publishes no ranking between Grammarly and QuillBot. Which program earns more depends on plan price, conversion rate, retention, and refund reversals in your own audience — none of which appear in published affiliate terms. Confirm eligibility, paid-search and trademark rules, and payout timing with each vendor before promoting either.