How Foundersuite Helped 100,000+ Startups Raise $21 Billion With Better Email Capabilities

Foundersuite is the all-in-one fundraising platform trusted by startups, accelerators, and investment firms worldwide. Nylas provides the communications infrastructure that keeps it running.

About Foundersuite

Raising capital is one of the hardest things a startup does. Foundersuite was built to make it more manageable — bringing structure, speed, and organization to a process that typically runs across spreadsheets, inboxes, and memory.

The platform gives founders a complete fundraising workflow in one place: a searchable database of 165,000 investors, an investor CRM to track pipeline, personalized outreach tools, pitch deck hosting, a data room, and deal document templates. For every stage of a raise — from building a target list to closing a round — Foundersuite has a purpose-built tool.

Foundersuite also operates Fundingstack, a sister platform for venture funds raising a new fund, investment bankers, and fundraising consultants running capital raises on behalf of clients.

To date, users of Foundersuite’s platforms have raised more than $21 billion in capital. More than 100,000 companies have run their fundraising on Foundersuite.

The Challenge: A Gmail Integration That Kept Breaking — and an Outlook Gap That Kept Growing

Investor outreach sits at the center of Foundersuite’s product. Once a founder builds a target list and loads it into their CRM, the next step is contact — personalized emails, tracked opens, timed follow-ups. For that to work inside Foundersuite, the platform needed a reliable connection to each user’s inbox – and reliable reporting and analytics on Opens, Replies, and more. 

Foundersuite’s engineering team built a direct Gmail integration to support this. For a while, it worked. But maintaining it became a recurring cost. Provider-side changes broke the connection, debugging took time, and the effort compounded — pulling engineers away from features that made Foundersuite better for founders.

There was a harder problem underneath that one. Roughly half of Foundersuite’s potential customers used Outlook, not Gmail. Without Outlook support, Foundersuite couldn’t serve them — and in some cases was losing customers to competitors that could. That gap wasn’t a minor inconvenience. It was cutting the platform off from half its addressable market.

Building a second direct integration on top of an already-strained Gmail connection wasn’t a viable path. The team needed infrastructure that could handle multiple providers without multiplying the maintenance burden.

Why Nylas: From Two Problems to One Integration

Foundersuite found Nylas through a cold email — which Foundersuite’s CEO, Nathan Beckord, described as “the right message at the right time.” Given that both companies focus on connecting people with the right message at the right moment, it was serendipitous that their initial connection came via this timely outreach, aligning perfectly with the team’s active search for a solution.

Nylas offered a single API covering Gmail, Outlook, and other providers, normalizing authentication, permissions, and provider behavior into one consistent integration. For Foundersuite’s engineers, that meant one codebase to maintain instead of two — and no more chasing provider-side changes.

Foundersuite has used Nylas’s Email API to power its outreach features since 2018. The specific capabilities that support the Foundersuite workflow include:

• Bi-directional email sync across Gmail, Outlook, and additional providers
• Personalized send with tracking — open rates and engagement signals surfaced inside the platform
• Draft and template support so founders can move quickly without starting from scratch
• Provider-agnostic authentication, removing OAuth complexity from Foundersuite’s stack

The Results: From Half the Market to All of It

With Nylas handling the communications infrastructure layer, Foundersuite recovered engineering capacity and expanded its market coverage at the same time.

The maintenance cycle that had pulled engineers away from product work ended. Provider changes no longer triggered debugging. The outreach features that founders relied on stayed stable.

The bigger win was market coverage. Roughly half of Foundersuite’s potential customers had been unreachable because they used Outlook. With Nylas, Outlook users had the same experience as Gmail users — the same outreach tools, the same inbox connection, the same reliability. The half of the market that had previously been a gap was now fully served.

Since partnering with Nylas in 2018, Foundersuite has grown to serve more than 100,000 companies. Users have raised more than $21 billion in capital.

What’s Next: Building Toward Autonomous Fundraising

Foundersuite is developing an autonomous fundraising AI agent — a product designed to handle investor discovery, outreach sequencing, and follow-up on behalf of founders with minimal manual input.

For that to work, the agent needs structured, normalized access to communications data across providers. It needs to read inbox activity, detect signals, and take action — not just observe. The communications infrastructure Foundersuite has run on since 2018 is the foundation that makes that next step possible.

Foundersuite and Nylas are in active conversation about how the Email API, and the broader Nylas platform, can support agentic workflows as that product takes shape.