Polar

Overview

Polar is a billing and merchant-of-record platform for software and AI products sold through subscriptions, usage charges, and digital benefits. It is best suited to teams that want metered invoicing and tax handling alongside checkout and delivery. Its appeal is breadth; its key trade-off is that metering records billable usage but cannot enforce customer quotas.

Key features

Polar ingests events, aggregates them into customer meters, and adds metered-price items to the next invoice. Teams can count or sum events, calculate averages, minimums, and maximums, or track unique values. Ingestion strategies cover LLM usage, streaming responses, S3-compatible storage, elapsed time, and manual events; LLM integrations include the Vercel AI SDK and compatible models that return usage data. This suits varied consumption-based pricing, but a product must enforce its own limits when customers cross quotas.

As merchant of record, Polar says it resells products in over 100 markets and handles payments, sales tax, fraud, refunds, and chargebacks. Hosted checkout includes localized currencies and sales tax. Automated benefits can grant usage credits, issue software license keys, deliver files up to 10GB, invite customers to private GitHub repositories, and assign Discord invitations and roles. Those delivery options make Polar relevant beyond recurring software subscriptions, particularly for products that bundle access with digital goods.

Stripe processes payments, and Polar says it does not store full card numbers or sensitive payment credentials. Its data processing addendum specifies encryption in transit and at rest, vulnerability scanning, access controls, and security logging. The product also lists iOS and Android apps and Raycast and Framer plugins.

Pricing

Polar has a free Starter plan and three paid monthly tiers. Starter is free and charges 5% + 50¢ per transaction; it includes all features to sell and standard support. That makes it a low-commitment way to start, but the highest transaction rate and standard support are less attractive as sales scale.

Pro is $20/month, with a 3.80% + 40¢ transaction fee, preview access to new features, and prioritized support. Growth is $100/month, lowering the fee to 3.60% + 35¢ while retaining preview access and prioritized support. Scale is $400/month, with a 3.40% + 30¢ fee, preview access, a shared Slack channel, P1 support, and single sign-on. The higher tiers trade a recurring bill for lower transaction rates and stronger support or account provisions; buyers should weigh the monthly cost against their transaction volume. Support rises from standard on Starter to prioritized on Pro and Growth, then P1 and a shared Slack channel on Scale.

Platforms

Polar supports Android, iOS, web, API, and extension platforms. Its listed apps cover iOS and Android, while Raycast and Framer are supported through plugins. It supports 118 countries and offers full tax handling.

Who it's for

Polar fits teams selling AI services or digital products that need subscriptions, metered charges, invoicing, and merchant-of-record handling in one billing stack. It is less suitable when the billing layer must automatically block usage at a quota: that enforcement has to live in the product itself.

Pros and cons

• Pros: Flexible meter aggregations and multiple ingestion strategies support varied usage-based pricing.
• Pros: Merchant-of-record services, localized checkout, and included sales tax consolidate important payment and tax responsibilities.
• Pros: Digital benefits cover credits, keys, file delivery, and community or repository access.
• Cons: Meters do not enforce quotas, so teams must implement usage limits separately.
• Cons: Every plan charges a transaction fee, and paid plans add a monthly commitment.

Alternatives

For a broader comparison, browse Merchant of Record Software. Choose Coda if shared documents are central to the workflow: its free plan limits shared docs to 50 objects and 1,000 table rows, while personal docs have no size or object limits. Tebex is an alternative with a free Starter plan, unlimited packages, and a 5% platform fee for most games or 15% for FiveM; its Plus plan is £12.49 per month.

Fungies suits sellers who want a free-forever plan with no monthly fee, setup cost, or per-seat charge; it charges 5% + 50¢ per sale. Lemon Squeezy is another no-monthly-fee ecommerce option, with transaction fees when sales are generated. Freemius may suit teams seeking transaction pricing without setup or monthly fees; its listed rate is 3.8% + 50¢ per transaction plus gateway fees.

Gumroad offers direct sales at 10% + $0.50 per transaction and a separate Discover marketplace route. NDEIGHT is an option for teams prioritizing unlimited payment links, subscriptions and trials, and finance receipts, at $49.00 USD per month. Whop offers tailored rates for high-volume businesses, with country-specific and volume-based pricing.

Verdict

Choose Polar if you need usage-based billing, subscriptions, digital delivery, and merchant-of-record services in one platform, and can enforce quotas in your own product. Look elsewhere if automatic quota blocking is essential or if Polar's transaction fees and paid-tier commitments do not suit your sales economics.