Primer Review

Primer is a London payments orchestration company founded in 2020 by former Braintree staff Gabriel Le Roux and Paul Anthony. It does not process payments itself. A merchant connects its own accounts with processors such as Adyen, Stripe or Braintree, and Primer sits on top: one checkout and API, a card vault that is independent of any one processor, no-code workflows that decide where each payment goes, automatic fallback to a second processor when the first declines, 3D Secure, network tokens, and reporting and reconciliation across every provider. Newer add-ons include an AI assistant called Companion, a fee breakdown tool called Costs Overview, and Global Accounts for holding and converting currencies, which Primer provides through a partner. Primer publishes no prices. As of October 2026 there is no pricing page; fees are set in a signed order form, charged on billable events such as payments, settled transactions, 3DS checks or workflow actions, and topped up to a minimum commitment if usage falls short. The contract runs for a minimum term and then renews for a year at a time unless you give 30 days' notice. Primer raised a $100 million Series C in May 2026 and says it has raised $174 million in total. It is built for mid-size and enterprise merchants running more than one processor, not for small businesses looking for a first card account.

What Primer is

Primer is a payments orchestration platform. A merchant integrates once with Primer's API and checkout, connects the processors it already has accounts with, and uses Primer to decide which processor handles each payment, retry declined payments elsewhere, store cards in one place and see results across every provider. Primer calls this unified payments infrastructure. It sells mainly to mid-size and enterprise online businesses in travel, ecommerce, gaming, fintech and digital content. Customers it names include GetYourGuide, Printful and Printify, Maisons du Monde, Conforama, AppsFlyer, New Look and the Australian bookmaker Dabble.

Primer was founded in 2020 by Gabriel Le Roux and Paul Anthony, who had both worked at Braintree, the PayPal payments business. Its UK company, Primer API Limited (company number 12355212), was incorporated at Companies House on 9 December 2019 with both founders as its first directors; Primer itself, and TechCrunch's report of its seed round, date the start of the business to early 2020, which is the year we use. TechCrunch reported its seed round, led by Balderton, in May 2020. Primer's own timeline lists an $18.7 million Series A led by Accel later in 2020, a $50 million Series B led by ICONIQ in 2021, an investment from Tencent in 2023, and a $100 million Series C announced in May 2026, led by Sofina with Peak XV Partners and all existing investors. Primer's About page puts total funding at $174 million; some news coverage of the Series C gives $170 million. Le Roux is co-founder and CEO and, according to Primer, is based in Switzerland. Companies House records show Anthony stepped down as a director of Primer API Limited in May 2026, and he is not on Primer's current leadership page. Primer says it has more than 150 staff, based in more than 30 countries, and that it handles more than 95% of its customers' total payment volume. In the Series C announcement Le Roux said the US accounts for around a fifth of Primer's revenue, with annual recurring revenue doubling year on year (the post does not say whether that growth figure is for the US or the whole company), and that Primer expects the US to be more than a third of its business by 2028. Primer does not publish a total processed volume beyond saying it handles billions each month.

Why we list Primer as a payment gateway

Primer does not hold the merchant agreement for card acceptance. Its documentation says you need at least one processor connected before you can take payments, and connecting one means giving Primer access to your own account with that processor, either by entering your credentials or by logging in through the processor, then adding your merchant accounts. Settlement and payouts come from those processors. Primer's terms say it is not responsible for your chosen payment processor, and the fees in Primer's own merchant agreement are for its platform services, not for processing. That makes Primer a gateway-layer technology provider in our taxonomy: it is not a payment facilitator, because it does not board you as a sub-merchant, and it is not a merchant of record. The one part of Primer that touches funds, Global Accounts, is provided through a third-party partner under separate terms.

What it costs

Primer publishes no prices, so we cannot tell you what it costs. As of October 2026 primer.io has no pricing page, and its contact page offers pricing plans and ROI calculations through a sales call. Rates are quoted per account. The standard merchant terms explain how a quote is built. Fees are set in a signed order form. Where they are usage-based, Primer counts billable events over each billing period. Its published glossary defines these as including payments (authorisations, settled payments and declines passed back by processors), settled transactions, 3D Secure checks that Primer performs, recovered transactions, total payment volume, workflow actions and triggers, instances, and a platform fee. If your billable usage falls below the minimum commitment in your order form, Primer invoices the minimum. Invoices are due in 30 days, and late fees accrue interest at 3% above the Bank of England base rate. The terms make you responsible for VAT, sales tax and other taxes on Primer's services.

Remember that Primer's fee sits on top of your processors' fees, not in place of them. The business case rests on Primer earning that back through higher authorisation rates, recovered declines, better routing on cost, or engineering time saved. Primer publishes figures for this, such as more than $410 million in payment volume recovered through Fallbacks and, in a case study, Banxa recovering more than $7 million in six months. These are the vendor's own figures and we have not seen them independently verified. Ask Primer to model the fee against your own decline and routing data before you sign.

How it works

• Checkout: a checkout for web and mobile that shows the payment methods each connected provider supports, including cards, Apple Pay, Google Pay, PayPal, buy now, pay later and local methods.
• Workflows: a no-code, drag-and-drop builder for routing conditions, A/B tests across processors or 3D Secure strategies by region, and follow-on actions such as automatic refunds on disputes or freezing suspicious transactions.
• Fallbacks: if the first processor declines, Primer retries through a backup processor you pick, reusing the original 3D Secure data so the customer is not challenged twice.
• Vault: a PCI DSS Level 1 vault that stores cards and other credentials independently of any processor, so a saved card can be charged through any connected provider.
• 3D Secure and network tokens: Primer runs its own processor-agnostic 3D Secure, which it says it applies only when needed, and supports network tokenization.
• Observability, Monitors and Reconciliation: dashboards and alerts across all providers, and matching of processor settlement files against payments.
• Costs Overview: a breakdown of each provider's fees into interchange, scheme, processor and FX components, part of Reconciliation.
• Companion: an AI assistant that answers questions about your payments data and workflows. Primer's terms state that Companion's output is not warranted to be accurate.

Contract terms

Primer's standard merchant terms (version 3.45, dated 22 May 2026) are published on its website and form part of every contract alongside the order form, which takes precedence where it sets special terms. The agreement runs for the minimum term in the order form, then renews automatically for one year at a time unless either side gives 30 days' written notice before the term ends. Primer can end the agreement after the minimum term on three months' notice for any reason. It can change fees from the next renewal period on 30 days' notice; if you object within seven days, the agreement ends at the end of the current term, and if you do not, the new fees apply. Primer can suspend or terminate immediately if it judges you a fraud, credit or other material risk, if you breach the terms, or if the law requires it. Its liability is capped at the greater of the fees you paid in that contract year or £50,000. Primer can also amend the merchant terms themselves at any time by written notice; if you object in writing within 14 days, your previous version continues to apply, but Primer may then end the agreement at the end of the current term. English law applies, and disputes go to the courts of England and Wales. Optional services supplied through third parties, such as card BIN data, 3D Secure and Global Accounts, carry extra terms; the BIN data terms, for example, make your indemnity for misuse uncapped.

Payouts and funds

Primer does not pay you for card payments. Funds settle from each processor to your bank account on that processor's schedule and under your agreement with it, so payout timing, reserves and holds are set by your processors rather than by Primer. Global Accounts, launched in 2025, is the exception: it gives you accounts for receiving settlements in several currencies, converting balances and sending transfers by local rails or SWIFT. Primer provides it through a third-party service provider under separate embedded finance terms. Its Global Accounts page states that payment services for US customers are provided by Airwallex US, LLC (NMLS #1928093), a licensed money transmitter in most states. Primer says Global Accounts supports local collection in more than 30 countries and payouts to more than 200.

Reputation and complaints

There is very little independent merchant feedback on Primer. Its public evidence is its customer list and a large set of case studies on its own site, and we could not load its G2 page to check ratings there. Its Trustpilot page, claimed by Primer in December 2022, shows a TrustScore of 1.6 from 21 reviews as of 23 October 2026, all of them one star, with 11 in the past year. These reviews are not from Primer's merchants. They come from consumers who say they were charged recurring subscription fees by a merchant called Yourselfirst, which offered online personality quizzes, and who blame Primer because its name was connected to the charges. Primer has not replied to them. They say more about one merchant using Primer than about Primer's service to merchants, but they show that consumers sometimes see Primer's name connected to charges they dispute, and that Primer does not respond publicly. Our searches found no lawsuit, regulatory action or data breach naming Primer.

Who should use Primer

Primer suits an online business that already sells in several countries, runs or wants to run more than one processor, and has a payments team with the volume to justify a platform fee on top of processing. For that business, a processor-independent vault, fallbacks and routing that payments staff can change without engineering work are real advantages, and the reporting across providers is useful in processor negotiations. It is the wrong choice for a small business, for anyone who needs a merchant account (you must bring your own processor), and for a merchant happy on a single processor. If you do sign, get the minimum commitment, the billable events you will be charged on and the minimum term in writing, and diary the 30-day notice date before each renewal.