Agentic spend management inside a bank: Brex sells AI agents that collect receipts, review, audit and book corporate expenses, and since April 2026 it does so as a Capital One subsidiary that its founder still runs.
How is Brex using AI?
Brex is now part of Capital One, which agreed to buy it for $5.15 billion in January 2026 and closed the deal on April 7, 2026; founder Pedro Franceschi still runs Brex. Its AI strategy is a set of agents for corporate spend (expense, review, audit and accounting agents) built on the Brex Assistant it launched in 2023. Brex says nearly 70% of expenses on its platform are handled entirely by automation, and that in 2025 automation freed over $163 million in annual salary dollars.
Category
Business finance & infrastructure
Founded
2017
Headquarters
San Francisco, United States
Licence and supervision
Wholly owned subsidiary of Capital One, N.A. since April 7, 2026 (parent Capital One Financial Corporation, NYSE: COF). Brex Payments LLC is a licensed money transmitter (NMLS #2035354); Brex Treasury LLC is a FINRA/SIPC member; Brex corporate cards are issued by partner banks (Emigrant Bank, Fifth Third Bank, Airwallex (Netherlands) B.V.), and business checking is provided by Column N.A.
Scale
About 35,000 business clients when Capital One closed its $5.15 billion acquisition of Brex in April 2026
Flagship platform
Brex AI agents
AI leadership
Pedro Franceschi · James Reggio · Art Levy · Frank LaPrade
- Capital One agreed on January 22, 2026 to buy Brex for $5.15 billion, about half cash and half stock, and completed the acquisition on April 7, 2026; the price was less than half Brex's $12.3 billion peak valuation from 2022. Brex is now a wholly owned subsidiary of Capital One, N.A. (see the Capital One profile at /banks/capital-one).
- Capital One and American Banker both single out Brex's AI: the bank describes Brex as an 'AI-native software platform' that uses AI agents to automate complex workflows, and American Banker lists four agents: expense, review, audit and accounting.
- Brex said in March 2026 that nearly 70% of all expenses on Brex are handled entirely by automation, letting managers review expenses six times faster and accounting teams close their books three times faster, and that in 2025 automation freed more than $163 million in annual salary dollars.
- Brex rebuilt customer onboarding as a multi-agent system (January 2026), taking card-application auto-approval from 0% to 40% in weeks and cutting manual identity reviews by 70%, Brex said.
- Brex opened its data to general AI assistants in 2026: a read-only app in ChatGPT for Enterprise users (March 4) and a Claude connector that can also update memos and attach receipts (March 23).
- Before the sale, Brex signed Fifth Third Bank (December 2025) to run the bank's commercial card on Brex's embedded platform and AI agents, a deal the companies said unlocks $5.6 billion in annual card volume.
- Capital One reported $96 million of pre-tax Brex integration expenses in Q2 2026, and Brex says Capital One is investing $950 million into it.
What is Brex AI agents?
A portfolio of agents on top of the Brex Assistant launched in 2023: an expense agent that collects receipts, a review agent that checks spend against policy, an audit agent and an accounting agent that syncs charges to the customer's ERP. Brex said in March 2026 that nearly 70% of all expenses on Brex are handled entirely by automation and that in 2025 its automation freed more than $163 million in annual salary dollars and saved customers over 208,000 hours a month.[17][14][1]
What has Brex done on AI, and when?
- Jul 22, 2026
Coding agents migrate 180 microservices[20]
Brex said a pipeline of self-hosted AI agents in Cursor let a single engineer migrate 180 microservices in a month, a 32x per-capita acceleration, with human review required before any merge.
- Jul 21, 2026
First Brex integration costs in Capital One's results[19]
Capital One reported $96 million of pre-tax Brex integration expenses in Q2 2026, with Brex results included in its Credit Card business from April 7.
- Apr 21, 2026
CrabTrap open-sourced[18]
An HTTP proxy that uses an LLM as a judge to check every request Brex's production AI agents make against an allowed-traffic policy; Brex said the LLM judge fired on fewer than 3% of requests in one production use case.
- Apr 7, 2026
- Mar 23, 2026
Brex connector for Claude[15]
Conversational access to expenses, limits, cards and policies inside Claude, including updating memos, attaching receipts and adding attendees on one's own expenses.
- Mar 18, 2026
OpenAI runs spend on Brex; automation figures[14]
Brex said it helps power OpenAI's global spend and that nearly 70% of expenses on Brex are handled entirely by automation, with more than $163 million in annual salary dollars freed in 2025.
- Mar 4, 2026
Brex app in ChatGPT[12]
A read-only app for ChatGPT Enterprise users to query limits, expenses, reimbursements and policies under existing Brex permissions; Brex called it one of the first financial apps in ChatGPT's app marketplace.
- Jan 22, 2026
Capital One agrees to buy Brex for $5.15 billion[9][10][11]
A roughly 50% cash, 50% stock deal disclosed with Capital One's Q4 2025 results; Brex was previously valued at $12.3 billion. Franceschi told CNBC that Brex did not have to pursue the deal, and Capital One said he would continue to lead Brex.
- Jan 21, 2026
AI-native Accounting API[8]
A two-way ERP integration tied to Brex's Accounting AI workflows, launching first with AI-native ERPs Rillet and Campfire.
- Jan 20, 2026
Onboarding rebuilt as a multi-agent system[7]
Brex said most eligible businesses now onboard in minutes; agents took card-application auto-approval from 0% to 40% and cut manual identity reviews by 70% and business-address information requests by 85%.
- Dec 9, 2025
- Aug 7, 2025
EU licence[4]
Brex said it could now directly issue cards and sell spend management to businesses in all 30 EU countries, having previously served only companies with a US presence.
- Jun 12, 2024
Brex drops its co-CEO model[2]
Pedro Franceschi became sole CEO and Henrique Dubugras chairman; TechCrunch noted Brex had laid off 282 people, about 20% of staff, in January 2024.
- Sep 19, 2023
Brex Assistant launches as the flagship of Brex AI[1]
An assistant that uses natural language and autonomous agents with calendar and past-expense data to fill in expense documentation, answer policy questions and execute commands; Brex said it had used AI since inception in underwriting, fraud, receipt matching and merchant categorization.
Where does Brex use AI today?
| System | What it does | Status | Use case |
|---|---|---|---|
| Expense, review, audit and accounting agents[17][14] | Agents collect receipts, check expenses against policy, audit spend and sync charges to the customer's ERP; Brex says nearly 70% of expenses on its platform are handled entirely by automation. | In production | Generative & agentic AI |
| Brex Assistant[1] | Employee-facing assistant that fills in expense details and answers policy questions such as spending limits for a trip, launched September 2023. | In production | Customer-facing chatbots |
| Audit agent and fraud simulation testing[17][13] | The audit agent reviews spend for abuse and policy violations; Brex tests it by simulating companies with planted fraud, and said the first run surfaced a failure mode that would otherwise have reached production. | In production | Fraud detection |
| Multi-agent customer onboarding[7] | Identity, fraud and fuzzy-match agents review applications; Brex reports 40% auto-approval of card applications and 70% fewer manual identity reviews. | In production | AML / KYC |
| Brex in ChatGPT and Claude[12][15] | Apps that expose a user's Brex data inside ChatGPT (read-only) and Claude (with limited write actions such as memos and receipts), under existing Brex permissions. | In production | Generative & agentic AI |
| CrabTrap agent proxy[18] | Open-source LLM-as-a-judge proxy that intercepts every outbound request from Brex's production agents and blocks traffic outside policy. | In production | Cybersecurity |
| Agent pipeline for code migrations[20] | Self-hosted agents in Cursor write, build and self-correct code for framework upgrades across 180+ services; agents cannot merge to production without human review. | In production | AI-generated code & coding agents |
Use-case links open the tracker's rules-by-use-case matrix: which documents govern each system type.
What has Brex disclosed in numbers?
| Metric | Value | As of |
|---|---|---|
| Acquisition price | $5.15 billion, about 50% cash and 50% stock[9][10] | Jan 22, 2026 |
| Peak private valuation | $12.3 billion (2022)[10][3] | Jan 11, 2022 |
| Business clients | about 35,000[17] | Apr 8, 2026 |
| Expenses handled entirely by automation | nearly 70%[14] | Mar 18, 2026 |
| Automation savings in 2025 | more than $163 million in annual salary dollars; over 208,000 customer hours a month[14] | Dec 31, 2025 |
| Onboarding agents | card-application auto-approval 0% to 40%; manual identity reviews down 70%; business-address RFIs down 85%[7] | Jan 20, 2026 |
| Fifth Third commercial card volume | $5.6 billion a year[5] | Dec 9, 2025 |
| Brex integration expenses at Capital One | $96 million pre-tax in Q2 2026[19] | Jun 30, 2026 |
“We started Brex in 2017 as a category creator – bringing together financial services and software into one AI-native platform”[9]
Pedro Franceschi · Founder and CEO, Brex · Jan 22, 2026
“We didn’t have to pursue this acquisition, our growth was incredibly strong”[10]
Pedro Franceschi · Founder and CEO, Brex · Jan 22, 2026
“Brex's expertise and AI-native technology combined with Capital One's scale, sophisticated underwriting and iconic brand creates a transformational opportunity in the business payments space”[16]
Richard D. Fairbank · Founder, Chairman and CEO, Capital One · Apr 7, 2026
“With accounting, accuracy and speed can’t be trade-offs”[8]
James Reggio · Chief Technology Officer, Brex · Jan 21, 2026
Who runs AI at Brex?
Which regulators govern Brex's AI?
| Authority | Why it matters here | Documents |
|---|---|---|
| OCC | Brex LLC is a wholly owned subsidiary of Capital One, N.A., a national bank, so Brex's agent products, its partner-bank card programmes and the AI vendors behind them now fall inside an OCC-supervised bank's third-party risk management. | OCC Bulletin 2023-17 |
| State money-transmitter regulators (NMLS) | Brex Payments LLC, which provides certain Brex payment services, is a licensed money transmitter (NMLS #2035354). | |
| FINRA | Brex Treasury LLC, which offers Brex's Treasury and Vault cash-management services and securities, is a FINRA/SIPC member. |
Linked authorities have a page in the AI Regulation Tracker; the others are named for completeness and not yet tracked.
What does the public record suggest about Brex's AI strategy?
Analysis by BankingNewsAI from the sources cited on this page. Observations, not advice.
01
Capital One bought the agents as much as the cards
Capital One's announcement and closing release both describe Brex as an AI-native platform using agents, and American Banker called Brex's AI capabilities 'a key nugget' for the bank. Capital One's own AI record is on /banks/capital-one.
02
The automation figures are Brex's own
The 70% fully automated share, the $163 million in salary dollars and the onboarding gains come from Brex press releases and engineering posts, not audited disclosures; Capital One reports Brex only inside its Credit Card segment.
03
Brex publishes its agent safeguards
The CrabTrap proxy, simulated-fraud testing of the audit agent and mandatory human review of agent-written code are all described publicly, giving an unusually detailed view of how a bank-owned fintech controls production agents.
04
The price reflects the 2023-24 reset, not the AI pivot
Brex sold for less than half its 2022 valuation after layoffs in 2024 and a return to a single CEO; its AI products expanded mostly after that reset, in 2025 and 2026.
05
Independence inside the bank is a stated design choice
Franceschi wrote that instead of fully integrating the businesses he would keep leading Brex and report to Capital One's Frank LaPrade, so Brex's AI roadmap is set by the fintech team rather than folded into the bank's.
Did Capital One buy Brex?
Yes. Capital One agreed on January 22, 2026 to acquire Brex for $5.15 billion in roughly equal parts cash and stock, and completed the deal on April 7, 2026. Brex is now a wholly owned subsidiary of Capital One, N.A., and founder Pedro Franceschi continues as Brex CEO. The price was less than half Brex's $12.3 billion peak valuation from 2022.
How does Brex use AI?
Brex runs AI agents across corporate spend: an expense agent that collects receipts, a review agent that checks policy, an audit agent and an accounting agent that syncs charges to ERPs, on top of the Brex Assistant launched in 2023. Brex says nearly 70% of expenses on its platform are handled entirely by automation.
Is Brex still independent?
No. Since April 7, 2026 Brex has been owned by Capital One. Franceschi wrote that the companies chose not to fully integrate: he continues to lead Brex with its own leadership team and reports to Capital One executive Frank LaPrade. Capital One reported $96 million of pre-tax Brex integration expenses in Q2 2026.
Does Brex work with ChatGPT or Claude?
Yes. Brex launched an app in ChatGPT for Enterprise users on March 4, 2026, read-only by design, and a Brex connector for Claude on March 23, 2026 that can also update memos, attach receipts and add attendees. Brex also said in March 2026 that it helps power OpenAI's global spend.
Is Brex a bank?
Brex itself is not a bank, but since April 2026 it is a subsidiary of Capital One, N.A., a national bank. Brex Payments LLC is a licensed money transmitter, Brex Treasury LLC is a FINRA/SIPC member, and Brex corporate cards are issued by partner banks such as Emigrant Bank and Fifth Third Bank.
How much time does Brex's AI save?
Brex says that in 2025 its automation freed more than $163 million in annual salary dollars and saved customers over 208,000 hours a month, that nearly 70% of expenses are handled entirely by automation, and that managers review expenses six times faster. These are Brex's own figures.
- Brex Gives Every Employee an Expense Assistant With AI
- Fintech Brex abandons co-CEO model, talks IPO, cash burn and plans for a secondary sale
- Brex eyes $500M in revenue as it adds the likes of Anthropic and Robinhood as customers
- IPO hopeful Brex scored major win to sell in the EU, plans UK expansion
- Fifth Third and Brex Partner to Bring AI-Powered Finance to Businesses, Unlocking $5.6B in Commercial Card Volume
- Fifth Third signs deal making fintech firm Brex the provider of its commercial cards
- The end of the trade-off: How AI agents broke the onboarding trilemma
- Brex Brings AI-Native Accounting Automation to ERPs
- Capital One to Acquire Brex
- Capital One is buying startup Brex for $5.15 billion in credit card firm's latest deal
- Brex is joining forces with Capital One
- Brex in ChatGPT: Your expenses, one question away
- How we test our agents: by committing fraud
- Brex Helps Power OpenAI Global Spend and Financial Operations
- Brex in Claude: Your expenses, now where you work
- Capital One completes acquisition of Brex
- Capital One pushes deeper into AI, business payments
- CrabTrap: an LLM-as-a-judge HTTP proxy to secure agents in production
- Capital One Reports Second Quarter 2026 Net Income of $3.0 billion, or $4.73 per share
- Agent automations for big migrations: How we accelerated framework upgrades by 32x with Cursor
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