The Funded Startups Automating Accounts Receivable with AI
Investors have funded AI accounts receivable automation since 2024. What the software does, and why vendor figures deserve scrutiny.
Venture investors have committed at least $147 million to four startups selling AI accounts receivable automation, the most recent disclosed round a $17 million Series A for San Francisco-based Fazeshift in May 2026.
All four pitch finance teams the same proposition: that software can chase overdue invoices, match incoming payments and score customer credit without a person doing the work.
Between them the four have raised less than a third of what a single incumbent has taken. HighRadius has raised $475 million and was valued at $3.1 billion at its last disclosed round, in March 2021, and reports more than 1,300 enterprise and mid-sized customers.
The startups are not entering an empty market. The established vendors already sell AI accounts receivable automation, hold the ledger data and have spent two years shipping agents of their own.
The underlying problem is not in dispute. Nearly four in five Western European companies faced late payment this year, according to credit insurer Atradius, and one in four lost up to 5% of turnover to overdue invoices.
Who has funded AI accounts receivable automation
Tabs has raised the most of the new cohort. Lightspeed Venture Partners led a $7 million seed round in April 2024, General Catalyst a $25 million Series A that October, and Lightspeed a $55 million Series B in September 2025, joined by Primary Venture Partners and WiL. Total funding stands at $91 million.
The company reports more than 200 customers and over $500 million in annual invoice volume, with revenue up fivefold in the year to the Series B.
Tabs sold billing, collections, revenue recognition and reporting before the Series B, which funded AI agents layered on those products. It is the most likely of the four to displace an existing billing stack.
Fazeshift raised $17 million in a Series A led by F-Prime Capital in May 2026, taking its total to $22 million, the company said. Gradient, Y Combinator, Wayfinder, Pioneer Fund and Ritual Capital have also invested, and Amex Ventures made a follow-on investment of undisclosed size in August 2026.
Fazeshift was founded in 2023 by Caitlin Leksana and Timmy Galvin and went through Y Combinator’s summer 2024 batch.
Its agents span cash application, collections, billing, credit limits and payment disputes. The company positions the product as an overlay, promising to “automate your existing processes, no rip-and-replace required”, a narrower claim than Tabs makes.
New York-based Monk announced a $25 million Series A on April 21, 2026, co-led by Footwork and Acrew Capital. BTV, which led a $4 million seed round in spring 2025, also participated, bringing total funding to $29 million.
Its platform covers invoice delivery, cash application, collections and reporting, with processing accuracy the company puts at over 80%. It advertises go-live in between 24 hours and seven business days.
Paraglide raised $5 million in seed funding in January 2026, co-led by Bessemer Venture Partners and DN Capital, with Born Capital and The Nordic Web Ventures participating. Founded by two former GetAccept executives, it is the only one of the four built in Europe.
Paraglide’s agents hold two-way exchanges with a customer, answering invoice queries and acting across finance systems, the company said, as against the one-directional reminder older tools send. It names Choco, GetAccept and Spiideo as customers.
Only one of the four publishes pricing. Tabs lists a $2,000 a month entry tier for companies with up to $5 million in revenue and 100 active contracts, with three higher tiers quoted on request.
Monk says pricing scales with volume and refers buyers to a demo. Neither Fazeshift nor Paraglide carries a pricing page.
What AI accounts receivable automation actually does
The products fall into three categories. Collections and dunning agents automate the chasing, while cash application tools match incoming payments to open invoices. Credit risk tools score customers before an invoice is issued.
AI accounts receivable automation metrics are self-reported
Monk says its software delivers on average a 40% reduction in days sales outstanding, more than 25 hours a month saved for receivables teams and a 24% higher collections response rate. Fazeshift advertises 90% less time spent on receivables, a 25% DSO reduction and 40% faster average payment time. Paraglide publishes a 34% DSO reduction, quoted from the finance director of one customer, Choco.
Every figure comes from the vendor. None has been independently audited, and none is published with the sample size, baseline or customer profile that would make it comparable.
The incumbents already hold the ledgers
Sidetrade, listed on Euronext Growth Paris, is the only significant vendor in the category whose numbers are audited and filed. It reported 2025 revenue of €61.4 million, up 12%, with EBITDA of €13.4 million at a 22% margin.
The company said 24 of its AI agents were in production or being deployed. HighRadius, which has automated cash application for years, now sells agentic collections to a similar customer profile.
Private capital has been consolidating the incumbents while venture capital funds the challengers. EQT took Billtrust private at $1.7 billion in December 2022, and Bridgepoint and General Atlantic took Esker private in 2025 after a public tender offer.
Late payment rules are tightening unevenly
Regulation is moving in the vendors’ favour in one major market. The Commercial Payments Bill, introduced in the Lords on May 19, 2026, completed report stage on September 15 and is scheduled for third reading on October 20. It has not yet reached the Commons.
The bill caps payment terms at 60 days where large firms pay smaller suppliers, with carve-outs including contracts between two large companies. It makes statutory interest mandatory at 8% above the Bank of England base rate, held at 3.75% in September 2026, and voids contract terms that exclude or vary that entitlement.
The Small Business Commissioner gains powers to investigate payment practices, adjudicate disputes and fine persistent late payers.
Elsewhere the compliance argument is weaker. The EU’s 2011 late payment directive remains the operative law, a proposed regulation capping terms at 30 days having gone unadopted since the Commission published it in September 2023.
In the United States, home to three of the four startups, the Prompt Payment Act binds federal agencies paying vendors rather than private companies paying each other.
Where the market goes next
The direction of travel is toward the wider finance stack. Tabs chief executive Ali Hussain said the company is “bringing modern AI agents to the CFO’s office, starting with billing, complex enterprise contract management, and collections”.
Incumbents are buying their way into new markets rather than building. Sidetrade paid €37.3 million for ezyCollect in the fourth quarter of 2025, opening Asia-Pacific, and North America became its largest region on 25% subscription growth.
It has since set out a strategic plan, Order-to-Cash Intelligence 2030, aimed at defining the standard for order-to-cash under agentic AI.
Corporate money is arriving alongside venture capital. Amex Ventures backed Fazeshift in August, an investor that brings distribution as well as cash.
The UK cap gives buyers a date to plan against, since payment terms are not expected to be capped before 2027.
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