Best Affiliate Software for SaaS in 2026 (7 Tools Compared)

The best affiliate software for a SaaS in 2026 comes down to one question: do you want to pay a flat subscription whether or not your program performs, or a percentage only when affiliates actually generate revenue? Every tool on this page is a different answer to that question, and the right pick changes with your ARR stage.

Two clarifications before the list. First, this guide is about software to run your own affiliate program for your SaaS — not a list of affiliate programs to join. Second, a disclosure: we build Affitor. It is one of the seven tools below, ranked where we honestly believe it belongs, and this post tells you plainly where the other six beat it.

Quick answer: what is the best affiliate software for SaaS?

Affitor is the best affiliate software for SaaS that wants to pay $0/month until affiliates generate their first $10,000 in revenue. Pick Rewardful if you want the simplest flat-fee setup for a Stripe SaaS, FirstPromoter if you bill outside Stripe and Paddle, Tolt if you want unlimited affiliates on a flat subscription, Dub Partners if developer experience decides your tooling, PartnerStack if you run a multi-type partner program with an enterprise budget, and impact.com if you need the largest partner marketplace and enterprise-grade tracking.

Every price on this page was checked against each vendor's live pricing page on July 5, 2026. Affiliate software pricing moves fast — two of these vendors materially changed their pricing pages in the three weeks before this was written — so treat the live pages as the source of truth.

How we compared the seven

Three questions separate these tools faster than any feature checklist.

How does it charge? Flat subscription, percentage of results, or both. Watch for double tolls: as of July 2026, Dub Partners charges a subscription plus a 5% payout fee, impact.com a subscription plus a 2.5% transaction fee, and Tolt a subscription plus 2% on automated payouts. Rewardful, FirstPromoter, and PartnerStack are subscription-only per their official pricing pages. Affitor is the inverse: no subscription, one performance fee.

What happens when the cookie dies? Cookie-window tracking is the category default and its weakest point. When the cookie is cleared, blocked, expired, or the buyer switches devices, the referral disappears and the affiliate who earned the sale does not get paid. Tools that anchor attribution to a durable identity — a signup record, a Stripe customer — survive that; pure cookie models do not. Rewardful, FirstPromoter, and Tolt are verified cookie-window models. Dub and Affitor anchor to the signup.

Can your coding agent do the integration? In 2026 a lot of Stripe SaaS integration work is done by AI agents. An audit of the major tools in this category in June 2026 found none of the six competitors shipping an official MCP server or an agent-completable integration runbook with a self-verify loop. APIs exist — Rewardful on all tiers, Dub's being the strongest, FirstPromoter's from $99/month — but they are human-developer surfaces. If agent-readiness matters to you, it narrows the list quickly.

1. Affitor — best for paying only on results

Affitor is our product, so here is the model stated plainly: you pay nothing until your affiliate program actually pays you.

Key features

Attribution is the architectural difference, not just the pricing. Instead of a tracking cookie, Affitor anchors attribution to the signup: the click ID is joined to a hashed email at signup and then to the Stripe customer ID, riding Stripe Checkout metadata (affitor_click_id, affitor_customer_key) through to the sale. A cleared cookie after signup does not lose the referral, because the identity chain no longer depends on the cookie.

The agent surface is live today, not a roadmap item: a skill.md runbook an agent can complete end to end, the affitor CLI, browser and server SDKs plus an MCP server (@affitor/sdk and @affitor/mcp, both labeled beta), and a self-verify loop that fires a synthetic click, lead, and sale through your live integration and returns integration_verified: true when the chain holds. You — or your agent — get proof the integration works before a single real affiliate joins. The full setup path is walked in How to create a Stripe affiliate program.

Pricing

$0/mo, $0 setup, and a 3.5% platform fee on affiliate-driven sales only. The fee is $0 until your program earns its first $10,000 through affiliates, then 3.5%. If your affiliates generate nothing, you pay nothing. There are no subscription tiers and no revenue caps.

Pros & cons

Pros: no subscription and no caps, so cost scales with results; attribution survives cookie loss and device switches; the only tool in this comparison an agent can integrate and verify end to end.

Cons: a percentage fee means Affitor gets more expensive than a flat subscription as your program scales. At $15,000/mo in affiliate revenue, 3.5% is $525/mo while Rewardful's Growth plan is $99/mo. The crossover sits between roughly $1,400/mo and $2,800/mo in affiliate-driven revenue, depending on which flat tier your volume would require — below that (and before your first $10,000 total, when Affitor is free), the performance model wins; above it, a flat subscription is cheaper on paper, if you stay within its caps. Affitor is also Stripe-native — if you bill elsewhere, FirstPromoter covers more rails — and it does not have the brand history Rewardful has built with indie hackers.

The flat-fee field: $49–$1,000+/mo from day one, whatever your affiliates deliver. Affitor: $0/mo, 3.5% on affiliate-driven sales after the first $10,000.

2. Rewardful — best for the simplest Stripe setup on a flat fee

Rewardful is the default pick in this category for a reason, and if a known flat cost is what you want, it earns the spot.

Key features

The simplest setup in the category for a SaaS on Stripe or Paddle, the strongest brand recognition among indie hackers, and a REST API included on every tier — even the $49 plan, which is rare in this peer group. The 0% transaction fee is genuine: the subscription is all you pay.

Pricing

Per rewardful.com/pricing (as of July 5, 2026): Starter is $49/mo for up to $7,500/mo in affiliate-generated revenue, with 1 campaign and up to 2 team members. Growth is $99/mo for up to $15,000/mo with unlimited campaigns and a branded affiliate portal. Enterprise starts at $149/mo above that. 14-day free trial, 2 months free on annual billing, no free tier.

Pros & cons

Pros: fastest path to a working program on Stripe; true 0% transaction fee; API access at every price point.

Cons: the revenue caps are the first thing that bites — cross $7,500/mo in affiliate revenue and the price doubles, not because you used more software but because your affiliates performed. Attribution is cookie-based (first- or last-touch, 60-day default window), so cleared cookies and device switches silently drop referrals. No agent runbook and no official MCP found as of June 2026. If the caps or the cookie model already hurt, the Rewardful alternatives guide goes deeper.

Rewardful: $49 to $149+/mo from day one, 0% transaction fee, cookie attribution. Affitor: $0/mo, 3.5% after the first $10,000, signup-anchored attribution.

3. FirstPromoter — best for billing providers beyond Stripe

FirstPromoter is the most feature-complete of the sub-$100 tools, and the practical answer when your billing stack rules the Stripe-only tools out.

Key features

MRR-based commissions, tax form handling, fraud detection, and billing-provider coverage beyond Stripe and Paddle — Chargebee and others. Personalized affiliate dashboards and a custom domain arrive on the Business tier. If you bill through a provider Rewardful does not support, FirstPromoter is often the shortest path.

Pricing

Per firstpromoter.com/pricing (as of July 5, 2026): Starter is $49/mo for up to $5,000/mo in affiliate revenue, 3 campaigns, 1,000 affiliates, and no API. Business is $99/mo for up to $15,000/mo with unlimited campaigns and affiliates, API and webhooks, and tax forms. Enterprise starts at $149/mo. 14-day trial, no card required. No transaction fee is stated on the pricing page.

Pros & cons

Pros: the deepest back office at this price — MRR-shaped commissions, tax forms, fraud detection; broad billing-provider coverage; three campaigns on the entry tier where Rewardful allows one.

Cons: the $5,000/mo cap on Starter is the lowest in this peer group, so upgrade pressure arrives earliest here. The API and webhooks are paywalled to the $99 tier — the entry plan is dashboard-only, which rules out programmatic and agent-driven setups at $49. Tracking is a cookie-window model on the front end (_fprom_* cookies, 60-day default); conversions are recorded at signup, but identity does not ride Stripe metadata natively. For the head-to-head with Rewardful, see Rewardful vs FirstPromoter.

FirstPromoter: API and webhooks from the $99 Business tier up. Affitor: API, CLI, and MCP access at $0/mo on every program.

4. Tolt — best for unlimited affiliates on a flat fee

Tolt is the cleanest modern product in the flat-fee mold, and it removes affiliate-count anxiety entirely.

Key features

Unlimited affiliates and referrals on every tier. Payout rails are the broadest here: PayPal, Wise, local bank transfer, crypto, and wire, with automatic payouts from the Growth tier up. At $99/mo, Tolt gives you more revenue headroom than Rewardful's or FirstPromoter's $99 tiers — a $20,000/mo cap versus $15,000 — which is a genuine edge at that price point.

Pricing

Per tolt.com/pricing (as of July 5, 2026): Basic is $69/mo for up to $10,000/mo in affiliate revenue with 2 programs and manual payouts only. Growth is $99/mo for up to $20,000/mo with 5 programs and automated payouts. Pro is $199/mo for up to $50,000/mo with unlimited programs. 14-day trial, no card required, 30-day refund. Note that software directories still show a stale $49 Basic price; the live page says $69.

Pros & cons

Pros: unlimited affiliates everywhere, the widest payout rails, and the best revenue-headroom-per-dollar of the flat-fee trio at $99.

Cons: the nuance sits in the payout fees. Tolt markets 0% transaction fees, and that claim has a footnote: automated payouts carry a 2% processing fee, and the Basic tier avoids the fee only because its payouts are manual. Attribution is cookie-based click tracking with a configurable window — the same fragility as Rewardful's. No API is surfaced on the pricing page, and no official MCP was found as of June 2026.

Tolt: $69 to $199/mo, plus 2% on automated payouts. Affitor: $0/mo, one 3.5% fee on affiliate-driven sales after the first $10,000.

5. Dub Partners — best for developer-first teams

Dub has the best developer experience in this list, and it is not close.

Key features

SDKs in five languages, real-time webhooks, and docs built for programmatic use. Credit where due on architecture too: Dub's attribution is anchored to the signup lead rather than to a cookie window, which makes it the closest system to Affitor's model here. If you already run Dub for link infrastructure, adding Partners keeps links, analytics, and payouts in one platform.

Pricing

Per dub.co/pricing (as of July 5, 2026): Partners requires a paid plan. Business is $90/mo with partner payouts up to $2,500/mo at a 5% payout fee. Advanced is $300/mo with payouts up to $15,000/mo, also at 5%. Enterprise is custom, annual, with a 3% fee. These numbers are fresh: between June and July 2026, Business went from $75 to $90, Advanced from $250 to $300, and the Advanced payout fee from 3% to 5%.

Pros & cons

Pros: best-in-class SDKs and webhooks, signup/lead-anchored attribution, and one platform for links, analytics, and payouts.

Cons: the toll structure. You pay the subscription and a 5% fee on every partner payout, and the payout caps meter your program's growth by tier — a Business-plan program cannot pay partners more than $2,500 in a month. Attribution records live inside Dub's network with no third-party-verifiable record, and the only MCP found in June 2026 was community-built and static-key, with no self-verify loop.

Dub Partners: $90/mo plus a 5% fee on partner payouts, capped by tier. Affitor: $0/mo plus 3.5% on affiliate-driven sales after the first $10,000, no payout caps.

6. PartnerStack — best for enterprise multi-type partner programs

PartnerStack is not really an affiliate tracker; it is a partner-relationship-management suite, priced like one.

Key features

A full PRM stack: a B2B partner marketplace where partners already on the network can discover and join your program, lead and deal registration, MDF management, and partner training (LMS). If you run affiliates, resellers, and referral partners as one program at scale, it is one of two serious options on this page.

Pricing

PartnerStack published pricing in mid-2026 after years of sales-gated quotes. Per partnerstack.com/pricing (as of July 5, 2026): Launch starts at $1,000/mo paid annually, Growth at $1,520/mo paid annually, Enterprise is custom. That is a minimum commitment of roughly $12,000 per year, demo-led, with no self-serve signup.

Pros & cons

Pros: marketplace distribution, multi-type partner motions, and enterprise partner operations that point tools do not attempt.

Cons: the price and the process. A ~$12,000/year minimum is unviable for pre-revenue or early SaaS, and the demo-to-contract onboarding means nothing an agent can complete autonomously. Attribution mechanics are not publicly documented, so we make no claims about them either way. If PartnerStack's price is the reason you are reading this, the PartnerStack alternatives guide goes deeper.

PartnerStack: from $1,000/mo billed annually, demo first, full PRM suite. Affitor: self-serve signup, $0/mo, affiliate programs only.

7. impact.com — best for an enterprise partner marketplace

impact.com is the incumbent enterprise partnership network, and for large brands its marketplace is the moat.

Key features

Roughly 90,000 partners discoverable in-network, cross-device tracking, fraud scoring, offline and call conversions, and custom reporting via Data Lab on the upper tiers. It automates the full partnership lifecycle — contracts, workflows, discovery — at a depth point tools do not attempt.

Pricing

Per impact.com/plans-b2b (as of July 5, 2026): Starter is "priced from" $30/mo but is ecommerce-only — it requires a Shopify, BigCommerce, WooCommerce, Adobe Commerce, or Squarespace integration, so it is not an option for a SaaS. The first SaaS-usable tier is Essentials, priced from $500/mo and demo-gated. Pro is priced from $2,500/mo, and Enterprise is contact-sales. On top of every plan sits a 2.5% fee on partner-driven transactions. "Priced from" means floors, not quotes.

Pros & cons

Pros: the largest partner marketplace in this comparison, enterprise-grade tracking depth, and full lifecycle automation.

Cons: the hybrid toll — a subscription floor and a 2.5% transaction fee — plus sales-led, weeks-long onboarding. The platform is built around ecommerce order feeds rather than Stripe-subscription SaaS: there is no Stripe-metadata-native tracking path, and no MCP or agent surface was found as of June 2026. For most SaaS teams below enterprise scale, this is the wrong aisle.

impact.com: from $500/mo for SaaS, plus 2.5% on partner-driven transactions, demo first. Affitor: $0/mo plus 3.5% after the first $10,000, self-serve in an afternoon.

Also evaluated: Post Affiliate Pro

Post Affiliate Pro has been in market since 2004 and carries the deepest feature checklist anywhere in the category — 220+ integrations, multi-tier and lifetime commissions, unlimited affiliates on every plan, and 24/7 support. It did not make the seven because it is built for every merchant type rather than for SaaS: usage is metered by tracking requests (10,000/mo on the $89/mo list-price Starter — a 33% promo runs until January 1, 2027), tracking is generic pixel/postback with no Stripe-native path, and setup is configuration-heavy with no agent runbook. For a Stripe-subscription SaaS, every tool above is a shorter path.

Which one should you pick?

The honest segmentation is by ARR stage, because the pricing models flip in value as affiliate revenue grows.

$0–500K ARR: pick Affitor, or Rewardful if you want a known flat cost. At this stage your affiliate program earns little or nothing yet, and a $49–$90 subscription is pure downside risk. Affitor is free until affiliates have generated $10,000, so the software decision needs no budget. If you would rather pay a predictable $49/mo for the category's most familiar tool, Rewardful is the default. Either way, decide your commission structure before your tooling — the how to start a SaaS affiliate program guide covers that order of operations.

$500K–5M ARR: run the crossover math. If affiliate-driven revenue is consistently above roughly $1,400–$2,800/mo, a flat plan gets cheaper than a percentage: Rewardful Growth at $99/mo covers up to $15,000/mo, and Tolt's $99 tier covers $20,000/mo with unlimited affiliates. If you bill through Chargebee or another provider beyond Stripe and Paddle, FirstPromoter's Business tier at $99/mo is a shortlist of one. If your team ships through SDKs and webhooks, price Dub Partners — subscription plus 5% — against what you would actually pay out. If affiliate revenue is still lumpy, Affitor's pay-on-results model keeps quiet months free.

$5M+ ARR: think in programs, not trackers. If you run affiliates plus resellers plus referral partners with a dedicated partner manager, PartnerStack's PRM suite and impact.com's roughly 90,000-partner marketplace are the real options — pick PartnerStack for B2B SaaS partner motions, impact.com when marketplace reach and enterprise tracking depth matter most. If it is still a pure affiliate motion, the Enterprise tiers of Rewardful ($149+/mo) or FirstPromoter (from $149/mo) — or Dub's custom Enterprise at a 3% payout fee — cover the volume.

Every tool at a glance

No official MCP server was found for any of the six competitors as of the June 2026 audit.

FAQ

What is the best affiliate software for SaaS?

Affitor is the best affiliate software for SaaS that wants to pay $0/month until affiliates generate their first $10,000 in revenue. Rewardful is the best flat-fee pick for a simple Stripe setup, FirstPromoter when you bill outside Stripe and Paddle, and PartnerStack or impact.com when you run enterprise partner programs.

How much does affiliate software cost in 2026?

Entry-tier pricing as of July 5, 2026: Rewardful and FirstPromoter $49/month, Tolt $69/month, Dub Partners $90/month plus a 5% payout fee, impact.com from $500/month for its first SaaS-usable tier plus a 2.5% transaction fee, PartnerStack from $1,000/month paid annually, and Affitor $0/month plus 3.5% on affiliate-driven sales after the first $10,000. Prices drift fast — two vendors changed their pricing pages in the three weeks before this was written.

Which affiliate software has no monthly fee?

Affitor is the only tool in this comparison with no monthly fee: $0/month, with a 3.5% platform fee on affiliate-driven sales that starts only after your first $10,000 in affiliate revenue. Every other tool has a subscription floor — Rewardful $49, FirstPromoter $49, Tolt $69, Dub Partners $90, impact.com $500 for SaaS, PartnerStack from $1,000/month paid annually (all as of July 5, 2026).

Does affiliate software charge transaction fees?

Some tools charge twice — a subscription plus a fee on top. As of July 5, 2026: Dub Partners adds a 5% payout fee (3% on Enterprise), impact.com adds a 2.5% fee on partner-driven transactions, and Tolt adds 2% on automated payouts. Rewardful states a genuine 0% transaction fee, FirstPromoter and PartnerStack list none on their pricing pages, and Affitor charges only its 3.5% performance fee with no subscription.

Can I run an affiliate program directly in Stripe?

No — Stripe has no built-in affiliate program feature, so you need affiliate software on top of it. Tools like Affitor and Rewardful integrate directly with Stripe: Affitor rides attribution on Stripe Checkout metadata, while Rewardful matches conversions through a tracking cookie. The Stripe affiliate program guide walks the full setup.

What is the difference between affiliate software and a partner network?

Affiliate software (Affitor, Rewardful, FirstPromoter, Tolt) tracks and pays affiliates you recruit yourself, typically self-serve from $0–$99/month. A partner network or PRM (PartnerStack, impact.com) adds a marketplace of existing partners, lead and deal registration, and partner training — at enterprise pricing from $500–$1,000+/month with sales-led onboarding.

What's next

The short version: pick Rewardful for the most familiar flat-fee Stripe setup, FirstPromoter for billing providers beyond Stripe and Paddle, Tolt for unlimited affiliates at a flat price, Dub Partners if you already live in Dub's link infrastructure and accept the payout fee, PartnerStack or impact.com when you are running enterprise partner programs, and Affitor if you want to pay only when your affiliates actually generate revenue, keep attribution alive after the cookie dies, or hand the whole integration to an agent and get back proof it works.

If the performance model fits your stage, create your program. It costs nothing to run until your affiliates have generated $10,000, so the way to evaluate Affitor is to launch with it.

If you want to see how signup-anchored tracking works before you decide, read the tracking docs. The click, signup, and sale chain is documented end to end, including the verification call that proves your integration is live.

More comparisons

• The best Rewardful alternatives for SaaS
• PartnerStack alternatives
• Rewardful vs FirstPromoter
• FirstPromoter alternatives
• Tolt alternatives
• Tolt vs Rewardful
• PartnerStack vs Rewardful
• Affiliate software pricing comparison