Best Subscription Billing Software for Bootstrapped SaaS (2026)

Verdict: For most bootstrapped SaaS products, Stripe Billing is the best subscription billing software: 0.7% of billing volume, no monthly fee, and dunning plus basic usage metering included. If you sell worldwide and do not want to handle sales tax or VAT yourself, pick a merchant of record instead: Paddle, or Polar if you want lower rates as you grow. Leave Chargebee, Recurly and Zoho Billing until you have a finance workflow that needs them.

Every price below comes from the vendor's own page, checked on 9 Nov 2026. The worked cost examples are our arithmetic and the picks are our opinion.

TL;DR#

• Stripe Billing: 0.7% of billing volume on pay-as-you-go, on top of 2.9% + 30¢ per US card charge. Smart Retries, reminder emails and usage meters included (Stripe Billing pricing).
• Paddle: 5% + 50¢ per checkout transaction, merchant of record, "No monthly fees" (Paddle pricing).
• Polar: 5% + 50¢ on the free Starter plan, dropping to 3.8% + 40¢ on Pro at $20/mo; merchant of record; +1.5% for non-US cards (Polar pricing).
• Lemon Squeezy: 5% + 50¢ headline, plus 0.5% on subscription payments and other add-on fees (Lemon Squeezy fees).
• Chargebee, Recurly, Zoho Billing: billing platforms on top of a gateway; useful later. Lago, Kill Bill: open source, free to self-host.

Disclosure: ZeroRaised publishes this guide and is a launch site for bootstrapped products. ZeroRaised has no commercial relationship with any vendor named here and earns nothing if you sign up. Facts come from the linked sources as checked on 9 Nov 2026.

What "billing software" actually does#

A payment processor moves money. A billing layer decides when to charge and how much: subscriptions, invoices, proration on mid-month upgrades, retrying failed cards (dunning) and metering usage.

Tools come in two shapes. Billing on your own processor (Stripe Billing, Chargebee, Recurly, Zoho Billing, Lago, Kill Bill): you are the seller, so sales tax and VAT are your job. Merchant of record (Paddle, Polar, Lemon Squeezy): they resell your product, handle tax and charge a higher fee. We cover that trade-off in merchant of record vs payment processor. Our read: decide the MoR question first; it narrows the list in a minute.

Comparison table#

"Not stated" means the pricing page we read did not say, not that the feature is missing. Sources are linked in each section below.

Worked example: what you pay at $5K and $20K MRR#

Assumptions (ours, for illustration): every customer pays $25 a month by US domestic card, so $5K MRR is 200 charges and $20K MRR is 800 charges. No international cards, no PayPal, no tax registrations. Gateway-based tools are assumed to run on Stripe at 2.9% + 30¢ per card charge.

All figures are our arithmetic from the cited rates. Example: Stripe Billing at $5K MRR is $145 (2.9%) + $60 (200 x 30¢) + $35 (0.7%) = $240.

Three things jump out:

• The per-charge fee hurts cheap plans. On a $9 plan, 5% + 50¢ takes more than 10%. Annual billing cuts the number of charges by twelve.
• The MoR premium is about 2.2 points of revenue for Paddle versus Stripe Billing in both columns (1 to 0.7 points for Polar Pro): the price of not doing tax compliance. Stripe Tax at 0.5% per transaction where you are registered narrows the gap, but you still file yourself (Stripe Tax pricing).
• International customers change the maths. Stripe adds 1.5% for international cards (Stripe pricing), Polar adds 1.5% for non-US cards and Lemon Squeezy adds 1.5% for transactions outside the US. Paddle's pricing page lists no separate international surcharge.

The tools, one by one#

Stripe Billing: best default for most#

Pay-as-you-go is 0.7% of billing volume, "Includes Billing transactions processed on and off Stripe. Excludes one-off invoices." There are no recurring fees. Once you are larger, an annual subscription paid monthly starts at $620 a month ("Save 11%"), with 0.67% on volume above the tier (Stripe Billing pricing).

Included: reminder emails for missed payments, Smart Retries, up to three recovery automations and a customer portal ($10 a month on a custom domain). For usage pricing, Stripe says basic usage-based billing stays available through its Meters API "with up to 100M events per month included", while advanced usage billing now runs through Metronome, which Stripe owns.

Our read: if you already use Stripe and sell mainly to one country, this is the obvious pick.

Paddle: simplest merchant of record#

Paddle charges "5% + 50¢" per checkout transaction with "No monthly fees, migration fees, or hidden extras", and covers "Global tax and regulatory compliance" plus fraud, chargebacks and buyer support (Paddle pricing). For products under $10 it invites you to ask for bespoke pricing.

Our read: the all-in price is easy to model, which matters when you sell to fifty countries.

Polar: MoR with tiers that get cheaper#

Polar's free Starter plan is 5% + 50¢. Paid plans trade a monthly fee for a lower rate: Pro $20/mo at 3.8% + 40¢, Growth $100/mo at 3.6% + 35¢, Scale $400/mo at 3.4% + 30¢. Polar says Starter, Pro, Growth and Scale "have no separate subscription fee"; extras are +1.5% for non-US cards and $15 per dispute (Polar pricing).

Our read: on our $25-plan example, Pro beats Starter once you pass roughly $1,250 MRR (50 charges, each saving 40¢, cover the $20 fee). Polar is the MoR to watch if you want tax handled but expect to grow into lower rates.

Lemon Squeezy: watch the add-ons#

The pricing page leads with 5% + 50¢ and "no monthly fee" (Lemon Squeezy pricing). The fees page adds "+0.5% for subscription payments", "+1.5% for international (outside of the US) transactions", "+1.5% for PayPal transactions" and "+5% for payments recovered through abandoned cart emails" (Lemon Squeezy fees). Failed payment recovery emails are listed as included.

Our read: for a subscription SaaS with many non-US customers, the effective rate can sit well above Paddle's.

Chargebee: power features, now on a percentage#

Chargebee's pricing calculator labels the meter "Monthly Invoicing Volume" and shows two Flow rates: "$0 + 0.80%" and "$99 + 0.65%", with a "$66K breakeven" (Chargebee pricing). Flow includes usage-based billing with 100M usage events a month, basic dunning for online and offline payments, and smart dunning. Enterprise is priced on active subscribers by quote.

The same page's structured product description says something different: "First $250K in cumulative billing free, then 0.75%." If that allowance applies to your account, Chargebee would be free for your first $250K of billing; ask Chargebee which terms are current before you sign up.

Our read: on the calculator rates it costs slightly more than Stripe Billing at small scale (our table uses those rates). It earns its place with complex plan catalogues, multiple gateways or a finance team.

Recurly: built for later#

Recurly Starter is "$249 per month + 0.9% of billing volume (first $40K of billings included at no charge each month)", with a 90-day free trial and one dunning campaign. All-Access requires a $1M billing volume minimum (Recurly pricing).

Our read: the $249 floor makes it the most expensive option in our $5K example. Revisit it later.

Zoho Billing: flat fee, no percentage#

Zoho Billing Standard is $39 and Premium $79 per organization per month billed annually; the page also shows $50 and $100, which appear to be the monthly-billed prices. There is a 14-day free trial, no free plan, and limits of up to 100,000 invoices a year with annual billed revenue up to $1M. Dunning management and usage-based billing are listed on Premium (Zoho Billing pricing).

Our read: the only flat-fee option here, so it gets relatively cheaper as you grow. A good fit if you already run on Zoho for books or CRM.

Lago and Kill Bill: open source, self-hosted#

Lago offers a self-hosted open source deployment, with cloud and professional services by quote (Lago pricing). Lago is built around usage-based billing, which pairs well with our guide to usage-based pricing for bootstrapped SaaS. Kill Bill describes itself as "Open-source billing and payments infrastructure you run yourself"; the open source tier is free and the site metadata lists an Apache 2.0 license (Kill Bill).

Our read: $0 in fees, but you pay in hosting, upgrades and being on call for billing.

Usage-heavy API products can also look at Orb, whose FAQ says one credit "works out to 0.60% of billing volume" (Orb pricing), and Metronome Starter at 0.8% of billing volume plus $0.04 per 1K ingested events (Metronome pricing). Both are overkill for most solo founders.

Failed payments: use what is included first#

Involuntary churn from expired or declined cards is the cheapest churn to fix. Before buying a tool, switch on what you already pay for.

• Stripe Smart Retries: "Using AI, Smart Retries chooses the best times to retry failed payment attempts". For new Stripe accounts it is on by default "for up to 8 retries within 2 weeks", and after the last attempt you can cancel, pause, mark unpaid or leave the subscription past due (Stripe docs). Pair it with Stripe's automatic reminder emails.
• Churnkey: Starter is $250/month billed yearly or $300/month billed monthly, for teams under $5k a month in churn volume, and includes payment recovery (Churnkey pricing).
• Baremetrics: Payment Recovery is a "+$129/mo" add-on to a Baremetrics plan (Baremetrics pricing).

Our read: at $5K MRR, a $250 recovery tool would need to save a lot of failed charges to pay for itself. Start with built-in retries and emails, then measure how much is still slipping through.

Our picks by stage#

These picks are our editorial judgement from the prices above. One more tip: check you can export customers and subscriptions before you commit, because moving billing later is painful.

Frequently asked questions#

What is the best subscription billing software for a small SaaS?#

For most early SaaS products, Stripe Billing is the best value: 0.7% of billing volume on pay-as-you-go plus Stripe's 2.9% + 30¢ US card fee, with Smart Retries, reminder emails and usage metering included. If you would rather not register for and file sales tax or VAT yourself, a merchant of record such as Paddle or Polar at 5% + 50¢ per transaction is simpler.

Is Stripe Billing free?#

No. Stripe Billing's pay-as-you-go plan costs 0.7% of billing volume with no recurring fee, on top of normal card processing (2.9% + 30¢ for US domestic cards). Larger businesses can switch to an annual subscription paid monthly, starting at $620 a month, which Stripe says saves 11%.

Is Chargebee free for startups?#

Possibly, but check first. Chargebee's pricing calculator shows two Flow rates on monthly invoicing volume, $0 + 0.80% and $99 + 0.65%, with a $66K breakeven, while the same page's product description says the pay-as-you-go plan has "First $250K in cumulative billing free, then 0.75%" (Chargebee pricing). Confirm the current terms with Chargebee before you model costs.

Should I use a merchant of record or Stripe Billing?#

Use a merchant of record (Paddle, Polar, Lemon Squeezy) if you sell to many countries and do not want to register for and remit sales tax or VAT yourself. Use Stripe Billing if you sell mainly in one market, are comfortable with tax compliance, and want lower fees. Our merchant of record vs payment processor guide covers the trade-off in depth.

What is the cheapest way to recover failed subscription payments?#

Turn on what your billing tool already includes. Stripe Billing includes Smart Retries, which for new accounts is on by default with up to 8 retries within 2 weeks, plus automatic reminder emails. Lemon Squeezy lists failed payment recovery emails as included. Dedicated tools cost more: Churnkey starts at $250/mo billed yearly and Baremetrics Payment Recovery is a $129/mo add-on.

Launch once billing works#

ZeroRaised is a launch directory for products built without institutional VC. Once customers can pay you, submit your product for free. For more guides on running a SaaS without investors, join the ZeroRaised newsletter.

Sources#

• Stripe Billing pricing, last checked 9 Nov 2026
• Stripe pricing (US), last checked 9 Nov 2026
• Stripe Tax pricing, last checked 9 Nov 2026
• Stripe Smart Retries docs, last checked 9 Nov 2026
• Paddle pricing, last checked 9 Nov 2026
• Polar pricing, last checked 9 Nov 2026
• Lemon Squeezy pricing, last checked 9 Nov 2026
• Lemon Squeezy fees, last checked 9 Nov 2026
• Chargebee pricing, last checked 9 Nov 2026
• Recurly pricing, last checked 9 Nov 2026
• Zoho Billing pricing, last checked 9 Nov 2026
• Lago pricing, last checked 9 Nov 2026
• Kill Bill, last checked 9 Nov 2026
• Orb pricing, last checked 9 Nov 2026
• Metronome pricing, last checked 9 Nov 2026
• Churnkey pricing, last checked 9 Nov 2026
• Baremetrics pricing, last checked 9 Nov 2026