Polar
6.1/10Polar is an open-source merchant of record and billing platform that lets developers and AI startups sell software subscriptions, usage-based plans and digital products worldwide.
Data last updated November 2026 · Our methodology
Overview
Polar is a monetization platform from Polar Software AB in Stockholm, built for developers selling software, SaaS subscriptions and digital products. As merchant of record, it calculates and remits sales tax such as EU VAT, GST and US sales tax in more than 100 markets, and it takes on fraud screening, refunds and chargebacks. Billing covers subscriptions, seats, prepaid credits and usage-based metering from ingested events, all combined on one invoice. Sellers get persistent checkout links that can prefill fields, apply discounts, override trial periods and carry UTM attribution, plus an optional hosted storefront and a customer portal. An MCP server lets AI agents such as Claude Code, Cursor and ChatGPT manage products and discounts. Pricing has four tiers: Starter is free at 5% + 50 cents per transaction, Pro costs $20 a month at 3.8% + 40 cents, Growth costs $100 a month at 3.6% + 35 cents, and Scale costs $400 a month at 3.4% + 30 cents. Early-stage AI startups can apply to get Scale free for 12 months. Organizations created before May 27, 2026 keep a grandfathered 4% + 40 cents rate. Polar suits solo developers, indie hackers and AI-native startups that want tax handling with little setup. It is not a full marketing suite: there is no email, SMS or campaign tooling, and users have complained about slow support during disputes.
Our Rating
Finance Software6.1/10
Marketing6.1/10
Who Polar is best for
Best software for DevelopersGood fit
It is built API-first with SDKs, webhooks and an MCP server for developers who monetize software.
Subscriptions, seats, usage metering and merchant-of-record tax handling cover the core billing needs of SaaS.
There is no monthly fee on Starter, and a startup program gives AI startups the Scale plan free for 12 months.
Solo builders can sell digital products without registering for sales tax themselves.
Less suited
There are no published SLA tiers, and users report slow support.
Pros & Cons
Pros
- As merchant of record, it calculates and remits VAT, GST and US sales tax in over 100 markets, so sellers do not register for tax themselves.
- Usage metering, seats, subscriptions and prepaid credits can be combined on one invoice, which suits AI products.
- Checkout links can prefill customer details, apply discounts automatically and pass UTM attribution through to orders.
- An MCP server lets AI coding agents create products and discounts directly.
- The free Starter tier has no monthly fee, and eligible AI startups can use the Scale plan free for a year.
Cons
- From May 2026, new Starter accounts pay 5% + 50 cents per transaction, up from the old flat 4% + 40 cents.
- To get lower rates you pay a monthly subscription on top of transaction fees.
- Users on Reddit and Trustpilot have reported slow or no support responses during disputes.
- It has no marketing features such as email campaigns or SMS, so you need separate tools for those.
- It is a young company, having launched v1.0 in September 2024.
Key Features
Not included
- Webinars
- SMS Marketing
- Social Media Scheduling
- Email Marketing
Polar Pricing
Starter
- 5% + 50 cents per transaction
- Merchant of record tax handling
- Subscriptions, usage billing and discounts
Scale
- 3.4% + 30 cents per transaction
- Free for 12 months through the Startup Program for eligible AI startups
Frequently Asked Questions
Starter is free at 5% + 50 cents per transaction. Pro ($20 a month) charges 3.8% + 40 cents, Growth ($100 a month) charges 3.6% + 35 cents, and Scale ($400 a month) charges 3.4% + 30 cents.
Yes. As merchant of record, Polar calculates, collects and remits taxes such as EU VAT, GST and US sales tax. It also handles fraud screening, refunds and chargebacks.
Organizations created before May 27, 2026 keep the 4% + 40 cents rate on a grandfathered Early Member plan, according to an independent 2026 comparison.
Yes. You create discounts in the dashboard and can apply them silently through a checkout link preset or let customers enter codes. Checkout links can also override trial periods for subscriptions.
Yes. It ingests events, meters them in real time and invoices usage automatically. It can combine usage with subscriptions, seats and prepaid credits on one invoice.
Polar raised a $10 million seed round led by Accel in 2025. Shopify CEO Tobias Lütke and president Harley Finkelstein are angel investors.
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Ranked near Polar in Finance Software
See Polar in the listPolar is #186 in Finance Software by our score.
