Overview
Warmly spent six years learning which parts of a sales signal customers would want, which parts a budget holder would buy, and which parts could support a company. The founders began in late 2019 with a co-founder matching app. They moved through digital business cards, job-change alerts, relationship intelligence, Zoom name tags, website visitor identification, and finally a system that joined buyer data to automated email, LinkedIn, and chat. HubSpot acquired Warmly in 2026 after the company passed 400 customers; Techstars reported that about 70% of them already used HubSpot as their main CRM.[1][2][3]
The exit validates two ideas and exposes the tension between them. Person-level context can make B2B outreach more timely and specific. The platform that already owns customer records, permissions, and seller workflow has a structural advantage in turning that context into action. Warmly built valuable signal and agent layers, then joined the system of record where most of its customers already worked.
Warmly announced a definitive agreement with HubSpot on June 30, 2026. HubSpot now describes the transaction as completed and Greenwald as a Product Director on Sales Hub; Techstars also treats it as an acquisition. The price and exact legal closing date were not made public. Warmly said customer contracts, pricing, account teams, product access, and integrations would continue at announcement.[4][5][3]
Founding Story
Max Greenwald met Carina Boo and Val Yermakova at Google. Greenwald was a product manager, Boo an engineering manager, and Yermakova a designer. Greenwald and Boo had worked together on a Google Maps April Fools project. Alan Zhao, a former trading analyst who learned software development through self-study and Hack Reactor, joined after meeting Greenwald through an On Deck hackathon. Contemporary reporting called all four co-founders; Warmly's current YC profile lists Greenwald, Boo, and Zhao.[1][6][7][8]
They left Google without a durable product idea. The first attempt matched prospective co-founders. “It was Tinder for co-founders,” Greenwald later said. “It was a terrible idea. It didn't make any money. No users wanted to use it.” Advice to find people who would pay for connections led them toward business relationships and, eventually, sales.[9]
The team entered Techstars Boulder in early 2020, after an initial YC rejection, with PushPull Cards: a digital business card and community-matching product. People used it, but monetization failed. A job-change monitoring concept called TrackAdvocates followed. It connected to Salesforce or HubSpot and alerted a vendor when a former customer champion joined another company. That had paying budget holders but could not grow into a large system on its own. YC admitted Warmly on its second application for Summer 2020.[1][2]
Timeline
- Late 2019: Greenwald, Boo, Yermakova, and Zhao began working together. A co-founder matching product failed its demand and payment tests.[1][2]
- 2020: The team joined Techstars, tried PushPull Cards, moved to TrackAdvocates, entered YC's Summer batch, raised a $2.1 million seed round led by NFX, and reported more than 30 early customers.[1]
- 2021: Rapport by Warmly mapped professional relationships. Greenwald later characterized it as broadly wanted but hard to sell.[2]
- 2022: Nametags added professional context inside video meetings. An enterprise version finally joined user value, budget ownership, and room to grow.[2]
- 2023: Website visitor identification and chat reached $1 million ARR. An $11 million Series A in October financed the move toward revenue orchestration.[2][10]
- 2024: Warmly bought sales-intelligence company Immagnify, added its signal data, and expanded automated outreach. The company reported $3 million ARR and more than 300 customers.[10][11]
- 2025: A $6 million extension led by RTP Global brought capital announced across the Series A rounds to $17 million. Greenwald described Warmly as moving from a feature to a product and then a platform.[10][2]
- 2026: Warmly expanded upstream with a Total Addressable Market agent, then HubSpot acquired the company. Techstars reported more than 400 customers and said Greenwald joined HubSpot's product organization.[12][3]
What They Built
Warmly's final product joined four jobs that sales teams often bought separately. It identified people and companies visiting a website, collected buying signals from first- and third-party sources, assembled account and contact context, and let agents act through chat, email, and LinkedIn. HubSpot and Salesforce integrations carried records and activity between the agent and the CRM.[13][12]
The Inbound Agent watched a visit, attempted person- and company-level identification, enriched the record, changed site content, opened a contextual chat, booked meetings, and routed qualified prospects. Warmly claimed roughly 15% person-level identification at greater than 90% accuracy and about 65% company-level identification at greater than 95% accuracy. These figures came from the vendor; no audited benchmark was located.[13]
The later TAM Agent addressed a customer objection: some companies did not have enough website traffic for an inbound agent to matter. Warmly's answer was to search beyond the site. The product described a graph of 30 million companies, 220 million contacts, and 37,000 intent topics, with signals from hiring, corporate news, public filings, GitHub, reviews, search behavior, and the buyer's own CRM. It could score accounts, find a buying committee, and activate prospects through HubSpot, LinkedIn, or email.[12]
Warmly acquired Immagnify in 2024 to add proprietary sales data and signal detection. Immagnify's founders joined Warmly, and Techstars credits a mentor introduction with bringing the two teams together. The deal gave Warmly more control over the inputs on which its automated actions depended.[11][3]
Market Position
Target Customers
Warmly initially sold to venture firms and young SaaS companies. Gem, Retool, and Optimizely appeared among the earliest users. By 2025 it described its core customer as a small or midsize B2B company that needed more pipeline without adding a large sales-development team; New Relic, Cyberhaven, and CircleCI were named customers. The product later added enterprise controls, integrations, and higher-priced plans.[1][10]
Market Size
No trustworthy public source isolates Warmly's serviceable market. The relevant budget spans sales intelligence, enrichment, website identification, conversational marketing, outbound sequencing, and revenue operations, which makes a single market-size estimate easy to inflate. Warmly's actual progression is better evidence: more than 30 customers in 2020, more than 300 and $3 million ARR in 2024, then more than 400 customers before the 2026 acquisition.[1][10][3]
Competition
Warmly overlapped with 6sense and ZoomInfo in intent data, Clearbit and RB2B in identification, Qualified and Drift in website conversation, Clay in enrichment workflows, Apollo in prospecting and sequences, and Common Room in person-level buyer intelligence. Its claim was that one context graph and a set of agents could replace the handoffs among those tools.
The 2026 acquisition pattern supports the category's consolidation. Apollo acquired Pocus to combine a 230-million-contact database with signal intelligence and revenue orchestration. Zoom agreed to acquire Common Room to put buyer intelligence beside sales conversations. HubSpot bought Warmly after buying Clearbit earlier. Each buyer joined data, context, action, and an existing seller workspace.[14][15][4]
Business Model
Warmly sold subscription software, with pricing rising as customers moved from identification to automated action. A current product explanation listed annual plans around $15,000 for web identification, $20,000 for inbound chat, $30,000 for an autopilot package, and $15,000 for the TAM Agent. HubSpot's marketplace showed a $750-per-month Growth plan with one domain, three users, and 500 active accounts, plus more than 600 installs and a 4.8 rating from ten reviews when indexed. Public prices changed over time and do not reveal average contract value or discounting.[16][17]
The financing record is clearest through February 2025. Forbes reported a $2.1 million seed round led by NFX in 2020. Warmly later announced an $11 million Series A from October 2023 and a $6 million extension led by RTP Global, calling the combined Series A capital $17 million. Later summaries report different lifetime totals, so the defensible statement is that Warmly had announced at least those rounds, not a precise final funding total.[1][10]
Traction
Greenwald's own chronology is unusually useful because it ties numbers to product shape. The 2023 website visitor and chat feature went from zero to $1 million ARR. The 2024 orchestration product reached $3 million ARR. Warmly's funding announcement also reported more than 300 customers in 2024 and planned a global team of 50. A 2026 interview publisher said Warmly had reached $7 million ARR, but that figure lacks the supporting period and accounting detail available for the earlier milestones, so it should be treated as a founder-interview claim.[2][10][18]
More than 400 customers before acquisition is meaningful, but the 70% HubSpot overlap explains more. It meant Warmly had found distribution in HubSpot's ecosystem while also depending on the CRM for records, workflow, and renewal value. The marketplace listing's 600-plus installs suggests a wider installation funnel than the paying-customer count. Neither source establishes retention, gross margin, agent accuracy in production, or revenue concentration.[3][17]
Post-Mortem
Warmly did not fail in the conventional sense. It found revenue, raised capital, bought another company, and sold to a strategic buyer. The post-mortem question is why a growing sales platform became more valuable inside HubSpot than as an independent vendor.
First, the pivot history shows disciplined learning as well as long discovery. Greenwald classified each version by three tests: user desire, budget-holder willingness, and room to grow. Co-founder matching failed all three. Digital cards had users without revenue. TrackAdvocates had buyers without enough scope. Rapport had demand without a budget. Nametags crossed the payment threshold, and website identification supplied a scalable entry point. Generative models then made the same signal useful for direct action across several channels.[2]
Second, action raised the cost of incomplete context. A stale title is annoying in a dashboard; it is damaging when an agent sends a message, changes a website, or updates a CRM. Warmly's Immagnify purchase and TAM Agent both expanded the context layer because reliable automated outreach needed more than a visitor event. That improved the product while pulling it into direct competition with databases, CRMs, engagement systems, and other agent platforms.[11][12]
Third, consolidation favored owners of workflow and distribution. HubSpot had the customer record, permission model, billing relationship, and the place where sellers already reviewed pipeline. Warmly had person-level signals and an action engine. With about 70% customer overlap, integration value was already visible before the deal. Apollo-Pocus and Zoom-Common Room show the same strategic direction across the market.[3][14][15]
The acquisition announcement promised continuity for customers and moved Greenwald into HubSpot's product team. It did not disclose consideration, investor returns, operating profitability, or whether every employee joined. Those omissions prevent a financial verdict. The product outcome is clearer: Warmly's final idea survived, and HubSpot absorbed it into a broader Sales Hub strategy.[4][5]
Key Lessons
- Test desire, payment, and scale separately. Warmly's versions failed for different reasons. Naming the failed test made each pivot more informative than a broad claim of weak product-market fit.
- A feature can be the right entry point. Website identification and chat were narrower than the eventual platform, yet they created the first clear recurring-revenue base.
- Automated action makes data quality a product requirement. The move from alerts to outbound agents increased the cost of an incorrect identity, stale role, or weak intent signal.
- Acquisitions can buy missing inputs. Immagnify added data and people that Warmly needed to own more of the context behind its agents.
- Ecosystem distribution can foreshadow the buyer. Heavy HubSpot overlap lowered integration risk and made Warmly's capabilities more valuable to HubSpot than they were as another adjacent tool.
- A 2026 rebuild needs a boundary the suites will not absorb quickly. Another general sales agent would meet platforms with larger data graphs and installed bases. A focused product should own governance, regulated workflow, or proprietary vertical outcomes.
Sources
- Warmly seed round and origin: Forbes
- Warmly's product chronology: Max Greenwald
- Warmly and Immagnify join HubSpot: Techstars
- Warmly is joining HubSpot: Warmly
- Warmly's exit and HubSpot role: HubSpot for Startups
- Warmly founder story: On Deck
- Val Yermakova profile: UC Berkeley Haas
- Warmly company profile: Y Combinator
- Max Greenwald on finding product-market fit: prodSens
- Warmly closes $17 million in Series A capital: Warmly
- Warmly acquires Immagnify: Warmly
- Warmly's TAM Agent: Warmly
- Inbound Agent product: Warmly
- Apollo acquires Pocus: Apollo
- Zoom agrees to acquire Common Room: Zoom
- Inbound Agent plans: Warmly
- Warmly HubSpot marketplace listing: HubSpot
- Greenwald on Warmly's scale and pricing: Paid