Grammarly vs Winston AI affiliate programs
Grammarly and Winston AI are AI writing tools that both run affiliate programs. Grammarly lists $0.20 per free signup + $20 per upgrade through Impact; Winston AI lists 40% of all revenues generated through Rewardful. One of the two does not state a cookie window, so the attribution windows cannot be compared. aifilliate records each program from a cited vendor source and does not rank the two.
| Recorded term | Grammarly Verified | Winston AI Verified |
|---|---|---|
| Commission | $0.20 per free signup + $20 per upgrade | 40% of all revenues generated |
| Structure | One-time | Unlisted |
| Cookie window | 90 days | Not stated |
| Network | Impact | Rewardful |
| Payout threshold | Not stated | $30 |
| Terms checked | 2026-08-22 | 2026-08-20 |
| Source | Open source ↗ | Open source ↗ |
What matches, what differs
Differences
- Different platforms: Impact against Rewardful, meaning two dashboards and two payout schedules.
In common
- Both are AI writing tools.
What these terms mean in practice
Promoting both means two applications, two dashboards, and two payout schedules — Impact for Grammarly and Rewardful for Winston AI, each with its own approval and its own minimum.
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.
- Winston AI does not publish whether the payout recurs.
- Winston AI does not publish a cookie window.
- Grammarly does not publish a payout threshold.
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. One of the two does not state a cookie window, so the attribution windows cannot be compared.
aifilliate publishes no ranking between Grammarly and Winston AI. 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.