Billing is the machine that turns an agreement into money: it prices the charge, issues the invoice, takes the payment and retries the ones that fail.
This guide ranks billing platforms on what the first ninety days cost in engineering hours, what a percentage of revenue becomes once volume grows, and how the billing history leaves.
AuthorHannah ReiterSenior Analyst, Business Applications
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In short
What billing software does
Billing software calculates what a customer owes, issues the invoice, collects the payment through the agreed method, and retries or escalates the charges that fail.
In this order: setup effort, what it really costs, how your data comes back out, whether
you can leave, and who each billing tool is built for. Why those five, and why there is no
score out of ten, is on the how we work page.
Organisations already running SAP finance that want billing inside it
Any company not already committed to SAP
Country is where the vendor is headquartered or contracts from, which is a
different question from where your data is hosted. Where the two tell different stories, the
entry says so.
Open source billing platform you host and control yourself
Ranked #1 of 13 in Best Billing Software in 2026.
Free tierOpen sourceSelf-hostablePublished pricingNorth America
Kill Bill is the only entry where no vendor can raise your rate, change your plan model or read your customer ledger. The catch is ordinary and serious: somebody has to run it, patch it and answer the phone at month end when an invoice run stalls.
Companies that already operate their own infrastructure find this an acceptable trade; companies that wanted billing to be someone else's problem do not.
What stands out
Open source
Self-hosted
Plugin model
Where it costs you
Self-hosted, you supply the operators, upgrades and monitoring; the hosted option is a separate contract
Documentation assumes engineering familiarity rather than finance
Right for
Engineering-led companies treating billing as a system they own
Wrong for
Finance teams without dedicated developers to run it
United StatesFree and open source (Apache 2.0) when self-hosted; paid Aviate tiers, support plans and a hosted option, quoted
SEPA mandates and recurring collection for European businesses
Ranked #2 of 13 in Best Billing Software in 2026.
Published pricingEurope
Mandates are the unglamorous core of European recurring revenue, and Twikey treats them as a lifecycle rather than a checkbox: signature, amendment, revocation and the audit trail a bank asks for when a customer disputes a collection.
Reconciliation back to the accounting ledger is genuinely good. It expects to sit beside a billing or invoicing system that owns the pricing, so budget for two products rather than one.
What stands out
SEPA direct debit
Mandate management
EU focus
Where it costs you
Not a pricing catalogue or a rating engine
Value drops sharply outside the SEPA area
Right for
European businesses collecting recurring payments by direct debit
Wrong for
Card-first businesses selling worldwide from one checkout
BelgiumPer month by plan from EUR 78, published; transaction volume packs extra
Merchant of record that owns the tax problem for you
Ranked #3 of 13 in Best Billing Software in 2026.
Published pricingEurope
The trade is explicit: Paddle becomes the seller, so it files the VAT, handles the invoices and absorbs the chargebacks, and you take a lower net rate for it. For a team of five selling into thirty countries that is cheaper than an accountant.
Once you have finance staff, the same percentage buys you nothing you could not do yourself, and your customer records live inside a relationship you cannot fully control.
What stands out
Merchant of record
Tax handled
Software sellers
Where it costs you
The rate is far above a plain card processing fee
You do not own the merchant relationship with your customer
Right for
Small software sellers who cannot staff international tax compliance
Wrong for
Companies with a finance team and their own VAT registrations
United Kingdom5% plus 50 cents per transaction, published
Billing and revenue schedules for mid-market finance teams
Ranked #4 of 13 in Best Billing Software in 2026.
Pricing on requestNorth America
Contracts, amendments and revenue schedules in one place, configured by accountants rather than developers, which is the reason it shows up on shortlists against much larger suites.
The limits are practical: a real implementation, a named internal owner, and an ERP outside its pre-built connectors (NetSuite, Sage Intacct, QuickBooks Online, Xero) becoming your project rather than theirs. Best when the auditor's questions drive the purchase.
What stands out
Revenue schedules
Contract billing
Finance-owned
Where it costs you
Pricing is quoted, with no self-service entry point
ERPs beyond NetSuite, Sage Intacct, QuickBooks and Xero need API work
Right for
Mid-market finance teams that own billing and revenue reporting
Wrong for
Engineering teams wanting an API-first billing service
Recurring invoicing and payment collection for small B2B companies, flat-priced
Ranked #5 of 13 in Best Billing Software in 2026.
Published pricingNorth America
ChargeOver is the answer for a company that bills the same clients every month and resents paying a percentage of revenue for it. Plans are flat, tiered by paying customers, with a published starting price, invoices and payment retries run on schedule, and the portal lets customers update cards themselves.
Its limits are scope and geography. Metered billing is in every plan, but complex contract changes stretch it, and a European business will want Twikey or GoCardless beside it for direct debit.
What stands out
Recurring invoicing
Flat pricing
B2B
Where it costs you
American payment rails; European direct debit needs checking
Price steps up a tier automatically as paying customers grow
Right for
Small US B2B companies invoicing recurring contracts who dislike revenue-share pricing
Wrong for
European companies collecting by SEPA mandate at volume
United StatesFrom $229 a month, tiered by paying customers, published; not a percentage of revenue
Merchant of record for software and digital goods sellers
Ranked #6 of 13 in Best Billing Software in 2026.
Pricing on requestNorth America
Two decades of selling software downloads shows in the details: local payment methods, licence key delivery and currency handling that newer merchants of record are still building. It also shows in the interface.
Because the rate is negotiated, small sellers usually do better on published pricing elsewhere, and larger sellers should benchmark the quote against the cost of registering for VAT themselves.
What stands out
Merchant of record
Global checkout
Digital goods
Where it costs you
Rate is quoted rather than published
Checkout customisation is limited compared with newer rivals
Right for
Software vendors selling worldwide with local payment methods
Wrong for
Companies wanting a published price before a sales call
United StatesPercentage of transaction value, quoted
Published-price billing that slots into the rest of Zoho
Ranked #7 of 13 in Best Billing Software in 2026.
Published pricingAsia-Pacific
Priced per organisation, with three users on Standard, ten on Premium and extra users sold as add-ons, and the link to Zoho Books removes a reconciliation step. The ceiling is real: complicated proration, event metering and unusual tax rules push past what the product does well.
Standard and Premium stop at $1M billed a year, and heavier customisation runs through custom functions or the REST API. Right for a first billing system, rarely the last one.
What stands out
Published price
Suite integration
Quick setup
Where it costs you
Usage rating is basic compared with dedicated metering tools
Deep customisation means learning Zoho's own scripting language
Right for
Small companies with simple recurring plans and published pricing
Wrong for
Usage-based pricing with high event volumes to rate
IndiaPer organisation per month, published; from $50 ($39 billed annually), subscription billing from $100 ($79)
Recurring billing wired directly into the payment processor
Ranked #8 of 13 in Best Billing Software in 2026.
Published pricingNorth America
Billing, payment and dunning in one place removes the reconciliation work that kills small finance teams, and the API is the best documented in this category.
The cost model is the argument against it: at scale you are paying a percentage of revenue for software whose workload has not grown. Card-first design also fits Europe badly, where direct debit is the cheaper instrument. Plan the exit before you have three years of subscriptions inside it.
What stands out
Usage billing
Published rate
Developer-first
Where it costs you
The percentage rate rises with revenue while the work does not
Subscription logic does not export with the data
Right for
Software companies already collecting card payments through Stripe
Wrong for
Businesses collecting mainly by SEPA direct debit or bank transfer
United States0.7% of billing volume pay-as-you-go, or volume-capped monthly plans from EUR 500 on a one-year contract; published
Simple merchant of record aimed at solo software sellers
Ranked #9 of 13 in Best Billing Software in 2026.
Published pricingNorth America
It does one thing cleanly: a checkout, a subscription and the tax handled, with less configuration than any other entry here. The acquisition changes the calculation rather than the product.
Stripe has already said where the investment goes: the team is building Stripe Managed Payments and has promised Lemon Squeezy users a migration route. Keep customer, plan and payment records in a form you can move, and do not build entitlement logic that only exists inside it.
What stands out
Merchant of record
Fast launch
Small sellers
Where it costs you
Development has moved to Stripe Managed Payments, with a migration promised
Thin on entitlements, contracts and enterprise invoicing
Right for
Solo founders and small teams launching a paid product quickly
Wrong for
Companies that sell to procurement departments on contracts
United States5% plus 50 cents per transaction, published
Configurable billing engine for unusual pricing models
Ranked #10 of 13 in Best Billing Software in 2026.
Pricing on requestNorth America
Almost every object is configurable, so pricing that defeats other products gets modelled rather than coded around. That flexibility is also the risk: after two years, an undocumented configuration built by a departed consultant is a migration project of its own.
Insist that the configuration is documented as a deliverable and that you get an export of the rating rules, not only the invoices.
What stands out
Highly configurable
Complex rating
Enterprise
Where it costs you
Configuration can become as hard to leave as custom code
Enterprise sales cycle and partner-led implementation
Right for
Enterprises with pricing too unusual for packaged billing tools
Wrong for
Standard monthly plans that any cheaper tool bills correctly
Telecom-grade billing and charging for high-volume operators
Ranked #11 of 13 in Best Billing Software in 2026.
Pricing on requestEurope
Designed for billing runs that cannot fail and volumes that break generic engines, with charging, mediation and self-care portals from one vendor rather than stitched together.
Cerillion is unusually transparent for its market because it is publicly listed, which makes its finances checkable. None of that helps a company with three pricing plans, and the operating assumptions inside the product are those of a network operator.
What stands out
Telecom BSS
Real-time charging
Long contracts
Where it costs you
Oversized for a software company's billing needs
Implementation measured in quarters, not weeks
Right for
Telecom and utility operators rating high volumes of events
Wrong for
Software companies with a few thousand subscriptions
United KingdomQuoted per organisation, licence or subscription
Ranked #12 of 13 in Best Billing Software in 2026.
Self-hostablePricing on requestEurope
Comarch matters in this category mostly because of where it is: a Polish vendor that will deploy on premise, which keeps the billing ledger inside a jurisdiction your regulator recognises.
The delivery model is the cost. Comarch consultants build it, Comarch consultants change it, and the internal knowledge you need to leave has to be negotiated into the contract rather than assumed.
What stands out
EU vendor
Telecom and utility
On-premise option
Where it costs you
Delivered as a consultancy engagement rather than a product purchase
Suite modules arrive with dependencies you may not want
Right for
European operators needing billing on their own infrastructure
Wrong for
Teams that want to buy, configure and run it alone
Billing and revenue management for existing SAP estates
Ranked #13 of 13 in Best Billing Software in 2026.
Pricing on requestEurope
The argument for BRIM is a ledger argument, not a billing one: charges, invoices and revenue land in the same system the auditors already examine, so the reconciliation between billing and finance stops existing.
Outside that context every comparison goes badly, because the price, the timeline and the partner requirement are all set by SAP's enterprise model rather than by the difficulty of the billing itself.
What stands out
SAP estate
Convergent charging
Partner-led
Where it costs you
Only makes sense inside an existing SAP finance estate
Module naming and packaging shift between releases
Right for
Organisations already running SAP finance that want billing inside it
Billing software calculates what a customer owes, issues the invoice, collects the payment through the agreed method, and retries or escalates the charges that fail. The differences that matter are rarely in the feature list, so this is
the order we would work through them.
01
Decide whether you need a published price
7 of the 13 tools here publish what they cost; the other 6 quote per organisation. The ones you can compare without a sales call: Kill Bill, Twikey, Paddle, ChargeOver, Zoho Billing, Stripe Billing, Lemon Squeezy.
02
Decide how much the jurisdiction matters
These 13 vendors are established in 6 countries across 3 regions (North America 7, Europe 5, Asia-Pacific 1). That decides whose disclosure law applies to what the vendor holds, wherever the servers are.
03
Consider whether you want the source
1 of these are open source: Kill Bill. Hosting one yourself trades a subscription for maintenance.
Billing or invoicing: most companies need the smaller thing
An invoicing tool produces a document and tracks whether it was paid. A billing platform decides what the document should say, every period, without a human. If your charges are the same each month and a person could type them, you do not need this category yet, and Zoho Billing is the cheapest place to find that out.
The line is crossed when charges vary by usage, contracts change mid-period, or the number of invoices outgrows the person producing them. Stripe Billing and Twikey are both reasonable first steps across that line, and neither requires a project. Buying an enterprise engine before the line is the classic overspend in this market.
Count how many invoices a person currently produces by hand each month.
Ask whether any charge varies with what the customer actually used.
If nothing varies, buy invoicing and revisit billing in a year.
What a percentage of revenue really costs
Three pricing models compete here and they cross over at predictable points. A merchant of record such as Paddle, FastSpring or Lemon Squeezy takes a percentage well above a card rate, and pays for it by removing tax registration and chargeback work. Stripe Billing takes a smaller percentage but leaves the compliance with you.
A licence from BillingPlatform, Ordway or Cerillion is a fixed cost that does not grow with revenue. Percentage models are cheap while you are small and quietly expensive later: at ten times the volume you are paying ten times as much for software doing the same work. Model your cost at the revenue you are planning for, not the revenue you have.
Recalculate every quoted rate at three times your current billed volume.
Price your own VAT registration and filing before dismissing a merchant of record.
Ask what the rate becomes at the next tier, in writing.
Dunning is the feature that pays for the software
Most of the money a billing system saves comes from payments that fail and are recovered, not from invoices that are produced. That makes the retry logic worth more scrutiny than the pricing catalogue.
Card failures need smart retries and card-updater services; European direct debit failures need mandate handling, which is why Twikey exists as a separate product and why card-first tools such as Stripe Billing and Lemon Squeezy fit European recurring revenue less well than their marketing suggests. Ask every vendor what proportion of failed charges they recover and how that number is measured, then check whether the dunning emails can be sent from your own domain and in your customer's language.
Ask for the recovery rate on failed payments and its definition.
Check whether direct debit mandates are managed or merely stored.
Confirm dunning messages can be edited, translated and sent from your domain.
Getting out is harder than getting in
A billing export gives you invoices and customers. It does not give you the pricing rules, the proration behaviour, the tax determination or the payment credentials, and those are what make the system work. Card tokens belong to the processor, so moving from Stripe Billing means a token migration request; a merchant of record such as Paddle holds the customer relationship itself, which is a harder conversation.
Kill Bill and, on premise, Comarch BSS avoid the problem by keeping the system where you can reach it. Whatever you choose, get the rating configuration exported in a readable form at least once a year, and keep a record of which subscription started on which terms.
Ask in the sales process how card tokens are transferred out.
Request an export of pricing rules, not only invoice records.
Store signed contract terms outside the billing system.
What goes wrong most often when buying billing software
Buying a billing engine when the problem was that nobody was chasing unpaid invoices. Fix the collection first; it is cheaper.
Comparing percentage rates without modelling them at the revenue you expect in three years, where the cheap option usually stops being cheap.
Assuming a card-first product handles European direct debit properly. Mandates are a lifecycle, not a stored bank number.
Letting a consultant configure the rating rules and not requiring the configuration as a documented, exportable deliverable.
07
Frequently asked questions
8 answers
What is the best billing in 2026?
Kill Bill leads our ranking of 13. The only open source entry here, so the billing rules stay on infrastructure you own, with plugins for the payment gateway of your choice rather than one vendor's.
Nothing about it is quick: you provide the operators, the upgrades and the reconciliation work. Choose it when billing is a core system you intend to staff, not when you want it to disappear.
Which billing tools publish their pricing?
7 of the 13, with the pricing model each one publishes:
Kill Bill: Free and open source (Apache 2.0) when self-hosted; paid Aviate tiers, support plans and a hosted option, quoted.
Twikey: Per month by plan from EUR 78, published; transaction volume packs extra.
Paddle: 5% plus 50 cents per transaction, published.
ChargeOver: From $229 a month, tiered by paying customers, published; not a percentage of revenue.
Zoho Billing: Per organisation per month, published; from $50 ($39 billed annually), subscription billing from $100 ($79).
Stripe Billing: 0.7% of billing volume pay-as-you-go, or volume-capped monthly plans from EUR 500 on a one-year contract; published.
Lemon Squeezy: 5% plus 50 cents per transaction, published.
The other 6 quote per organisation.
Is there a free billing tool?
Kill Bill offer a free tier or a free self-hosted edition.
Where are these billing vendors established?
In 6 countries across 3 regions: North America 7, Europe 5, Asia-Pacific 1.
Kill Bill: United States.
Twikey: Belgium.
Paddle: United Kingdom.
Ordway: United States.
ChargeOver: United States.
FastSpring: United States.
Zoho Billing: India.
Stripe Billing: United States.
Lemon Squeezy: United States.
BillingPlatform: United States.
Cerillion: United Kingdom.
Comarch BSS: Poland.
SAP BRIM: Germany.
Which billing tools are open source?
Kill Bill.
Which billing tools can you host yourself?
Kill Bill, Comarch BSS. The other 11 are hosted by the vendor only.
What should you use instead of Kill Bill?
Twikey and Paddle are the next two on this page. Twikey is for European businesses collecting recurring payments by direct debit; Paddle is for small software sellers who cannot staff international tax compliance.
Who should not buy Kill Bill?
Finance teams without dedicated developers to run it. Self-hosted, you supply the operators, upgrades and monitoring; the hosted option is a separate contract.
If your billing product belongs among these 13, tell us what it does and who it is for. Inclusion is an editorial call; what a listing is and is not is set out under software advice.
