Sponsy vs Stack Influence Comparison 2026
Both cover brand deals & sponsorships. Here is what separates them on price, billing, what you can take with you, and coverage.
Run newsletter sponsorships without a spreadsheet
Micro influencer posts at a flat fee each
At a glance
- Neither has a free tier.
Side by side
Sponsy | Stack Influence | |
|---|---|---|
| Starting price | From $79 | Not listed |
| Pricing model | Paid subscription | Paid subscription |
| Free tier | No | No |
| Billing (they differ) | Monthly or annual | Usage-based |
| Free trial | 7 days | Not stated |
| API | Not stated | Not stated |
| Data export | Not stated | Not stated |
| Their cut | Not stated | Not stated |
| Runs on | Web | Web |
| Covers | Brand Deals & Sponsorships, Newsletter & Email | UGC & Creator Marketplaces, Brand Deals & Sponsorships |
Shaded rows are where the two answers disagree and both listings have answered. A row where one side has not stated a fact is left plain, because silence is not a difference.
Sponsy
Run newsletter sponsorships without a spreadsheet
Sponsy is the back office for a newsletter that sells its own advertising: a booking calendar, the assets, the invoices and the reporting a sponsor expects afterwards. Selling directly is what makes newsletter advertising worth doing, and the admin is what makes people stop. It handles the admin. Publishers running one letter will find the cheaper tier is the whole product.
Our note
The flat fee is the thing to weigh, because $948 a year is nothing against a healthy sponsorship business and a lot against a letter selling one slot a month. Work out what an hour of your admin costs before deciding, since that is the only saving this makes.
Only on this side
- Covers newsletter & email
Stack Influence
Micro influencer posts at a flat fee each
Stack Influence runs micro influencer campaigns as a managed service and charges per completed post rather than per month, which is the opposite of how most of this category is sold. Creators are paid in product, and the brand pays a fee when a post goes live. That makes the cost of a campaign a multiplication rather than a contract. Anybody wanting to pick each creator by hand will find the managed model frustrating.
Ratings are the average of reviews readers left. The facts are stated by each tool’s own listing and are not verified by CloutStack. How we make money.