Pylon Raised $17M From a16z in 14 Days: How Marty Kausas Built a B2B Support Platform YC Said Would Never Work

TL;DR: Pylon is a customer support platform built for B2B companies — one system for tickets arriving in shared Slack channels, Microsoft Teams, Discord, WhatsApp and email, instead of bolting Slack onto a tool designed for consumer support. It was founded in November 2022 by Marty Kausas, Advith Chelikani and Robert Eng, and went through Y Combinator's Winter 2023 batch. YC had seen the idea fail repeatedly, and told Kausas so the day after he had it. Pylon has since raised a $17 million Series A led by Andreessen Horowitz (August 2024) and a $31 million Series B co-led by a16z and Bain Capital Ventures (August 2025), bringing total funding to $51 million, with 750+ customers as of the Series B announcement. Kausas told the whole story on The Product Market Fit Show.

What does Pylon do?

Pylon replaces the traditional help desk for companies that sell to other businesses.

"Pylon is building the first customer support platform built for B2B companies. The simplest way to think about it is we are replacing products like Zendesk, Intercom, Salesforce Service Cloud, but building it specifically for the B2B persona." — Marty Kausas, Pylon

The wedge was a change in where B2B conversations actually happen. Instead of routing customers to an email address or a support widget, software companies open a shared Slack channel with each important account — then Teams channels, Discord communities, WhatsApp threads. On the show Kausas said his first customer, Hightouch, was already running roughly 300 shared Slack channels when Pylon met them.

None of the incumbent support tools could see into those channels. Tickets went unlogged, activity never synced to the CRM, feedback was lost, and a product announcement meant copy-pasting the same message into hundreds of channels by hand.

Pylon's scope has since widened past support. B2B companies hire customer success managers before support engineers, and that buyer kept asking for account management, onboarding workflows, product feedback and customer marketing in the same place — so Pylon grew into a system for the whole post-sales team, with AI layered in once the platform underneath it existed.

Key stat: As of its Series B announcement in August 2025, Pylon reported 750+ customers and more than 150 companies migrated onto Pylon from Zendesk, Intercom and Salesforce Service Cloud, with named customers including Hightouch, HackerRank, AssemblyAI, Together AI, Cognition and Temporal.

Who founded Pylon?

Marty Kausas (CEO), Advith Chelikani and Robert Eng. Kausas spent two years as an engineer on Airbnb's payments team out of school, then spent roughly 18 months on two startups that went nowhere — a Parkinson's symptom-tracking product with a co-founder who had early-onset Parkinson's, and a second idea with an Airbnb colleague who would never leave full-time employment.

The co-founder story is unusual: they turned him down. Chelikani and Eng were already exploring ideas together and told Kausas three technical founders was one too many. He courted them for about three months, and at one point they picked a different, more business-oriented third co-founder — a deal that collapsed within days over equity. That rejection shaped what he was looking for.

"I just want to work with someone who's kind of similar to me, who I'm going to be excited about working on any idea because we're likely going to pivot. And so I want to be able to pivot with the same people." — Marty Kausas, Pylon

Key stat: On the show Kausas said the three co-founders paid themselves $35,000 a year after YC, California's legal minimum — and were still net saving money each month, on a $1,200 room in a hacker house and $400 to $500 of groceries.

How did they find the idea?

Not by scratching their own itch. They tried that first and concluded none of their own problems could become a big company. So they ran a filter instead: only B2B, only horizontal SaaS, and only on top of an emerging trend.

The reasoning was quantitative. On the show he said they counted the public SaaS companies worth over a billion dollars — roughly 76 at the time, fewer than 30 above $10 billion — and found almost all were horizontal, sold to any company rather than one industry. He also noted Salesforce holds only about a quarter of the CRM market it defined: big markets have room even when they look taken.

Then they went looking for the trend, on the hypothesis that new job titles signal new workflows. So they targeted post-sales roles — support engineers, customer success managers — and cold-messaged them on LinkedIn.

"we wake up every day, we go on LinkedIn, we're messaging 120 personalized messages between the three of us every day, booking probably seven 15-minute calls for each day for probably three months." — Marty Kausas, Pylon

Key stat: Kausas estimated on the show that the three of them ran roughly 420 customer interviews over about three months before the shared-Slack-channel insight landed.

The insight arrived through a friend at a Series B startup, then got confirmed thirty seconds later: Kausas was living in a San Francisco hacker house with Tejas Manohar, a founder of Hightouch. He walked upstairs and asked whether they had the problem. They did — and were already shopping for a tool.

What did YC actually say?

The day after they had the idea, they took it to a YC open office hours session.

"I had the idea probably on a Saturday, the next day we talked to YC, they tell us the idea sucks and they also say that they've seen this idea a million times and it never works for anyone." — Marty Kausas, Pylon

YC liked the founders anyway and offered an interview in two days or two weeks. They took two weeks, spent it selling Hightouch's head of support engineering through Thanksgiving, and walked in with the product already live in a customer's hands. They got into the Winter 2023 batch.

They were not the first to try this. By his own count on the show, Pylon was the 13th company to start from the exact same point — add a ticket emoji to a Slack message, forward it to Zendesk or Intercom. Their first customer had built that product internally before them. Version one was a single integration:

"if your customer sends you a message in a shared Slack channel, you can add a ticket emoji to that message. And that would thread and say, Hey, a ticket's been opened. And then it would send that message to Intercom. And then you could reply from Intercom and it would show up in Slack." — Marty Kausas, Pylon

Two pieces of timing he says he did not see coming: Zendesk's private equity acquisition closed the day after they settled on the idea, and ChatGPT launched about a week later. The first slowly weakened the incumbent they would attack. The second made them look, inside their own batch, like the founders who had missed the wave — at least ten companies in that batch were building AI for customer support while Pylon built a Slack connector.

The pivot that cut their own revenue

The uncomfortable part of the story is the year in between. They spent roughly twelve months selling the integration, charging around $10,000 a year for it, and reached $120,000 in ARR by the end of the YC batch — on the strength of companies paying more for the Slack connector than for the help desk it connected to.

"So we spent, believe it or not, and it's almost embarrassing to say, we spent a whole year working on the Slack app." — Marty Kausas, Pylon

Two signals pulled them off it. Small prospects refused to buy Zendesk at all and could not understand why they needed two tools. Large customers kept listing gaps that Zendesk, now owned by private equity, was clearly never going to fix. So in January 2024 they became the full support platform — and, as Kausas said on the show, took a big revenue drop doing it, because an add-on sells to a Series E company and a Zendesk replacement does not.

They restarted downmarket, added email, then a chat widget, then account management, and grew about 5x over 2024 to what Kausas would only describe as low single-digit millions in ARR. They were cash-flow positive on annual upfront contracts, with a team of 20 at the time of the interview.

How much has Pylon raised?

• Seed: $3.2 million, led by General Catalyst (about $2.2 million of it), closed in six days during the YC batch, as Kausas described on the show.
• Series A: $17 million, led by Andreessen Horowitz, announced August 28, 2024, with Jennifer Li joining the board. Total raised passed $20 million.
• Series B: $31 million, co-led by a16z and Bain Capital Ventures, announced August 19, 2025, with General Catalyst and Y Combinator participating. Total funding to date: $51 million (verified September 2026).

"one important thing I'd say is how the investor hears about you is one of the most important things, especially early stage." — Marty Kausas, Pylon

Instead of asking for warm intros, they had founder friends approach investors unprompted, so the message an investor received was not "Pylon wants to meet you" but "are you looking at Pylon yet? I'm buddies with the founder." They booked 40 to 60 investor meetings in a single week for the seed, and back-channelled their revenue as it moved from $30K to $60K to $80K ARR during the raise.

The Series A was not planned at all. They were cash-flow positive with $3.1 million still in the bank when an angel-investor contact on their monthly update list came to the office and asked what it would take. Their reasoning was that a better offer three months later was unlikely and something could go wrong in between, so they ran the process immediately — three partner meetings in one day, and a term sheet 14 days after the start.

"We prepared the deck the night before, and I practiced in the morning and my co-founders were like, is this all we have?" — Marty Kausas, Pylon

Slide two of that deck was a photo of co-founder Robert Eng looking up from a mattress on the office floor.

Key lessons from Marty Kausas's playbook

1. A rejected idea is not a dead idea. YC had watched a dozen companies fail at the same starting point. What changed was the conditions around it — Slack-first B2B support becoming normal, an incumbent going quiet after a PE buyout — not the pitch. 2. Pick the market before the problem. They filtered for horizontal B2B SaaS on an emerging trend first, then ran 420 interviews to find a problem inside that box. The order stops you falling in love with a small market. 3. Interview volume is a strategy, not a chore. 120 personalized LinkedIn messages a day for three months is what generated the one call where the insight showed up. 4. Be willing to shrink to grow. Moving from a profitable add-on to a full platform cost them revenue and forced them downmarket. It also bought them a category instead of a feature. 5. Fundraising is a distribution problem. How an investor first hears your name — from a peer founder, unprompted — did more work than the deck, which was written the night before. 6. Raise when someone else starts the conversation. They did not need the money. They took it because the offer was in front of them and a better one later was not guaranteed.

For related stories on a16z-backed founders and lean teams, see Pinecone after 40 VC rejections, Larridin's $17M a16z round and Suger reaching $2M ARR with five people.

FAQ: Pylon

Q: What is Pylon? A: Pylon is a customer support platform built for B2B companies, replacing tools like Zendesk, Intercom and Salesforce Service Cloud. It lets support and customer success teams manage tickets arriving through shared Slack channels, Microsoft Teams, Discord, WhatsApp, email and chat in one system, alongside account management, product feedback and customer marketing.

Q: Who is the CEO of Pylon? A: Marty Kausas, who co-founded the company in November 2022 with Advith Chelikani and Robert Eng. Kausas was previously an engineer on Airbnb's payments team.

Q: How much funding has Pylon raised? A: $51 million as of September 2026 — a $3.2 million seed led by General Catalyst, a $17 million Series A led by Andreessen Horowitz announced in August 2024, and a $31 million Series B co-led by a16z and Bain Capital Ventures announced in August 2025.

Q: Who are Pylon's investors? A: Andreessen Horowitz (lead on the Series A, co-lead on the Series B), Bain Capital Ventures (Series B co-lead), General Catalyst (seed lead) and Y Combinator. Jennifer Li of a16z joined the board with the Series A.

Q: Which YC batch was Pylon in? A: Winter 2023. YC initially told the founders the idea would never work, then offered them an interview on the strength of the team; they used the two-week gap to get their first customer piloting the product.

Sources: Listen to the Full Founder Story

• Marty Kausas, Co-Founder and CEO of Pylon — was told by YC that his idea had failed a dozen times before, lived in the office with his co-founders, ran 420 customer interviews to find the wedge, and raised $17M from a16z in 14 days without planning to fundraise at all.

Listen to the full episode at pmf.show for the complete story.

Last updated: September 2026