At least 62 YC startups with over $1.9 billion in funding are hosting on Replit

RUNTIMEWIRE INVESTIGATION — Original analysis

Original reporting by RuntimeWire, based on data analysis, public records.

Why it matters

Replit's enterprise push is showing up in public infrastructure: funded startups are using it for production-facing endpoints, even when their core products remain elsewhere.

Reporting record

A single Google Cloud IP address used by AI coding platform Replit led RuntimeWire to a much larger startup cluster: at least 62 other Y Combinator companies were serving custom domains through the platform on August 18, 2026.

Together, those companies have raised approximately $1.91 billion in disclosed funding. Their 160 verified hostnames offer a concrete sign that AI coding is moving beyond toy demos and into production-facing work at funded startups.

The DNS records cannot show whether Replit's AI agent wrote the code. They do show that people with access to company-controlled domains authorized Replit-hosted endpoints, including tools, portals, landing pages and application components. For founders evaluating whether AI-assisted software creation will persist after the current hype cycle, that distinction matters: the technology is already being attached to real business infrastructure, even when it is not replacing the primary engineering stack.

What RuntimeWire found

• 160 Replit-verified hostnames associated with 63 companies in the Y Combinator directory, including the platform itself
• 57 companies listed by YC as active, five as inactive and one as acquired
• Approximately $1.91 billion raised by the 62 companies other than Replit
• Approximately $2.79 billion raised when the platform's roughly $878 million in disclosed financing is included
• Roughly three-quarters of the external capital concentrated among the 10 best-funded companies

The finding gives an outside view of the enterprise adoption that co-founders Amjad Masad and Haya Odeh have spent the past two years pursuing.

Masad, previously a founding engineer at Codecademy and the head of Facebook's JavaScript infrastructure team, repositioned the platform from a browser-based coding environment toward software creation for non-programmers and business teams. The DNS footprint shows that some of that adoption has reached projects connected to heavily funded startups, even when the platform is absent from their public technology stacks.

The largest companies in the cluster

The best-funded names account for most of the capital:

• Aspire, a Singapore business-finance platform, says it has raised more than $300 million across equity and debt.
• Recruiting software maker Fountain has raised about $219 million.
• Education fundraising platform GiveCampus has completed approximately $191 million in disclosed investments.
• Flexible staffing marketplace Instawork says its funding totals $160 million.
• Substance-use treatment platform Pelago reported $151 million after its 2024 Series C.
• Hospital automation provider Qventus has announced investments of $100 million and $105 million since 2022. The latter included a debt component that RuntimeWire excluded from its equity funding calculation.
• Commercial insurance platform Shepherd reported $67 million in total funding after a March 2026 round.
• Generative video company Tavus has raised about $64 million.
• Global insurance provider SafetyWing has raised $47 million.
• The cluster also includes microschool operator Prenda.

How the DNS trail worked

RuntimeWire began with 34.111.179.208, an address assigned to Google Cloud infrastructure. Public scans show traffic on the address passing through Replit's deployment layer, while Replit-linked domains use it as an A record for custom-domain publishing.

An IP match alone was insufficient because shared cloud addresses can serve unrelated customers and services. RuntimeWire therefore required two signals:

1. The hostname pointed to the Replit-linked IP address.
2. The hostname or its root domain had a TXT record beginning with replit-verify=.

That TXT record is used to verify control of a custom domain during a Replit deployment.

Recruiting software maker Fountain provides a visible example. Public DNS records place start.fountain.com and tools.fountain.com on the Replit-linked address, while the rest of Fountain's public product infrastructure uses other providers.

That split illustrates both the significance and the limits of the evidence. It establishes Replit-hosted endpoints under a company-controlled domain. It does not show that Fountain's hiring platform runs on Replit or that an AI agent created either endpoint.

RuntimeWire then:

1. Mapped the resulting root domains to YC's company directory.
2. Checked each company's operating status.
3. Compiled funding totals from company announcements, financing reports and funding databases.
4. Rounded those totals to the nearest million.

The $1.91 billion figure is an approximate capital total, not an audited measure. Public databases differ in how they count debt facilities, secondary transactions, accelerator checks and repeated regulatory filings.

What the records show

The Replit platform remains closely associated with rapid prototypes and AI-generated applications, but these records extend beyond disposable demos. A custom domain requires someone with access to a company's DNS configuration to authorize the endpoint.

The 160 records include:

• Landing pages
• Internal or external tools
• Portals
• Application components

All are attached to companies that have collectively raised billions of dollars. That does not make AI coding a wholesale replacement for conventional software development. It does indicate that software built or deployed through an AI-focused coding platform is finding durable, production-facing uses inside funded companies.

The records do not prove that every hostname is a centrally approved deployment. An employee could build a utility or campaign site, receive a delegated subdomain and publish it without making the platform part of the company's primary engineering stack. Some endpoints may also be old projects whose DNS records were never removed.

The data says nothing about the sensitivity of the information handled by each application.

Replit's enterprise push

The company has been pushing directly into this gap:

• In 2025, Masad said more than 500,000 business users were building internal tools and customer-facing applications on the platform.
• In May 2026, the company made its Enterprise plan self-serve.
• The company has increasingly marketed publishing, access controls and production deployment alongside its AI agent.

Investors have financed that move aggressively. The company raised $250 million at a $3 billion valuation in September 2025, followed by another $400 million at a $9 billion valuation in March 2026. The latest round included Georgian, G Squared, Prysm Capital, Coatue, Andreessen Horowitz, Craft Ventures and Y Combinator, among others.

The DNS cluster supplies independent evidence for the business case behind those rounds. AI coding does not need to replace established engineering infrastructure to become permanent. It can spread through many smaller, production-facing projects, with business teams and individual employees adopting it one endpoint at a time.

Why 160 hostnames is a minimum

Reverse-IP discovery cannot reveal:

• Deployments hidden behind Cloudflare or another proxy
• Projects using different Replit addresses
• Applications published only on Replit-owned domains

The visible endpoints are only the portion of the platform's startup footprint that companies exposed through public DNS.