Klaviyo at a glance
Question | Answer | As of |
|---|---|---|
Who owns Klaviyo? | Public shareholders; co-founder Andrew Bialecki controls 44.1% of the votes | Apr 2026 |
Market value | About $5.8 billion (NYSE: KVYO, $20.71 a share) | Nov 6, 2026 |
Revenue | $1.234 billion in 2025, up 32%; 2026 guidance $1.537–1.541 billion | Nov 2026 |
Latest quarter | $387.2 million, up 25%, with a small GAAP profit | Q3 2026 |
Customers | More than 211,000; 4,725 pay over $50,000 a year | Sep 30, 2026 |
Raised before the IPO | About $778 million in announced rounds; the IPO added $326 million | Sep 2023 |
Employees | 2,368 | Dec 31, 2025 |
CEO | Co-CEOs Andrew Bialecki (co-founder) and Chano Fernández | Since Jan 1, 2026 |
Founded | 2012, in Boston, by Andrew Bialecki and Ed Hallen | 2012 |
Headquarters | 125 Summer Street, Boston | Nov 2026 |
Email format | {first}.{last}@klaviyo.com (95% of known addresses) | Nov 2026 |
The company is Klaviyo, Inc., incorporated in Delaware in 2012 (SEC). It calls its product a B2C CRM: email, text and WhatsApp messages, push notifications, reviews, customer service and AI agents for consumer brands, built on its own customer database (SEC).
Who owns Klaviyo?
Klaviyo is public, but its co-founders control it. It has two share classes: Series A, traded on the NYSE with one vote each, and Series B, with ten votes each (SEC). As of April 15, 2026, co-CEO Andrew Bialecki held 44.1% of all votes and co-founder Ed Hallen 18.6%; directors and executives together held 64.5% (SEC).
Holder | Share of votes | Note |
|---|---|---|
Andrew Bialecki | 44.1% | Co-founder, chair and co-CEO; 48% of Series B |
Ed Hallen | 18.6% | Co-founder and chief strategy officer |
Shopify | 17.4% | Counts an option to buy 15.7 million shares at $88.93, far above today’s price |
Summit Partners | 10.9% | Led the 2019 round |
Accomplice | 6.4% | Early investor |
Table source: Klaviyo’s 2026 proxy statement (SEC). Large fund managers such as Capital International, Vanguard and Fidelity hold Series A shares but have few votes (SEC). Shopify’s stake comes from a 2022 deal: a $100 million investment, warrants, and Klaviyo’s place as the recommended email provider for Shopify Plus merchants (SEC).
What is Klaviyo’s revenue?
$1.234 billion in 2025, up 31.6% from $937.5 million in 2024 (SEC). On November 4, 2026 Klaviyo raised its 2026 forecast to $1.537–1.541 billion, about 25% growth, after third-quarter revenue of $387.2 million, up 25% (SEC). Sales outside the Americas made up 35% of 2025 revenue (SEC).
Year | Revenue | Growth | Source |
|---|---|---|---|
2026 (guidance) | $1.537–1.541B | About 25% | |
2025 | $1,234.0M | 31.6% | |
2024 | $937.5M | 34.3% | |
2023 | $698.1M | 47.7% | |
2022 | $472.7M | 62.7% | |
2021 | $290.6M | Not disclosed |
Klaviyo has never published revenue for 2020 or earlier; its IPO filing starts with 2021.
Klaviyo ARR (annual recurring revenue)
Klaviyo doesn’t publish a company-wide ARR figure. It uses ARR, the monthly value of paid subscriptions times twelve, only to count large customers: 4,725 customers paid over $50,000 of ARR on September 30, 2026, up 33% (SEC). Management instead gives revenue run rates: “a nearly $1.5 billion annualized run rate” at the end of June 2026 (SEC). Third-quarter revenue of $387.2 million works out to about $1.55 billion a year; that is our calculation.
Klaviyo MRR (monthly recurring revenue)
Klaviyo doesn’t publish MRR. Third-quarter 2026 revenue of $387.2 million averages about $129 million a month; that is our calculation, not a company figure.
Is Klaviyo profitable?
Barely, under standard accounting, and solidly on an adjusted basis. In the third quarter of 2026 it earned $0.7 million (SEC), after a $31.8 million net loss in 2025 (SEC). Leaving out stock pay, its operating margin was 15% in the quarter, and it generated $200.4 million of free cash flow in 2025 (SEC). Customers spend more over time: net revenue retention was 108% (SEC).
How much is Klaviyo worth?
About $5.8 billion: the stock closed at $20.71 on November 6, 2026 (Stock Analysis). That is well below its IPO. Klaviyo listed on the New York Stock Exchange on September 20, 2023 at $30 a share (Klaviyo), a $9.2 billion valuation (CNBC). The shares ended 2025 at $32.47 (SEC), then hit a record low of $15.51 on May 6, 2026, after first-quarter results and the news that its CFO would leave (Schaeffer’s).
Klaviyo is buying back stock. It spent $500 million under a program announced in March 2026 {src('SEC', EK_BUYBACK)} and completed in October, and authorized another $300 million on November 4, 2026 (SEC).
How much did Klaviyo raise? Funding and IPO
About $778 million across its private rounds, by the announced amounts, then $326 million for the company in the IPO (SEC). The founders ran Klaviyo for three years without venture money (TechCrunch), and had raised only $8.5 million before Summit Partners invested $150 million in 2019 (TechCrunch).
Round | Date | Amount | Lead | Valuation | Source |
|---|---|---|---|---|---|
IPO (NYSE: KVYO) | Sep 20, 2023 | $576M in total; $326M to Klaviyo | Goldman Sachs, Morgan Stanley, Citi | $9.2B | |
Strategic investment | Jul 28, 2022 | $100M, plus warrants and an option | Shopify | Not disclosed | |
Series D | May 18, 2021 | $320M | Sands Capital | $9.15B pre-money | |
Series C | Nov 17, 2020 | $200M | Accel | $4.15B | |
Series B | Apr 8, 2019 | $150M | Summit Partners | Not disclosed | |
Earlier rounds | 2015–2017 | $8.5M in total | Accomplice and others | Not disclosed |
Filings give a smaller figure. The IPO prospectus says Klaviyo raised “$454.8 million in primary capital” since it was founded (SEC): part of the money in its rounds paid for buying back shares from early holders, including a 2020 tender offer and a 2021 repurchase, so it never stayed in the company (SEC).
What does Klaviyo make? Products
Klaviyo started in 2012 as a database for e-commerce data, then became known for email marketing (TechCrunch). It now sells AI agents for marketing and customer service; email, text, WhatsApp and push messaging; social and reviews; customer service tools; and its data platform (SEC). In February 2025 it renamed the whole product a B2C CRM (Klaviyo).
Date | Launch or acquisition | Source |
|---|---|---|
Sep 9, 2026 | Klaviyo Headless: its platform opened to AI agents such as Claude and ChatGPT | |
Aug 7, 2026 | Acquires the team and technology of Agency AI for $15M | |
Aug 2025 | Acquires Gatsby, social automation, now Klaviyo Social | |
Feb 20, 2025 | Klaviyo B2C CRM, adding customer service | |
Oct 2022 | Acquires Napkin.io, a developer platform | |
Jul 28, 2022 | Becomes Shopify’s recommended email provider for Shopify Plus |
Klaviyo vs Mailchimp, Braze and HubSpot
Klaviyo’s $1.23 billion of 2025 revenue is about 1.7 times Braze’s $738 million in its year to January 2026 (SEC), and about two-fifths of HubSpot’s $3.1 billion (SEC). Mailchimp belongs to Intuit, which bought it for $12 billion in 2021 (TechCrunch) and doesn’t report its revenue separately. Attentive, its main SMS rival, passed $500 million in ARR in 2024 (Contrary Research); Omnisend says over 150,000 online stores use it (Omnisend).
Who is the CEO of Klaviyo?
Klaviyo has two co-CEOs since January 1, 2026. Co-founder Andrew Bialecki, CEO since 2012 and the board’s chair, focuses on AI and product; Chano Fernández, a former co-CEO of Workday and a Klaviyo director since 2023, runs sales, operations and administration (Klaviyo). Forbes estimates Bialecki’s net worth at about $1.7 billion (Forbes).
Person | Role | Source |
|---|---|---|
Andrew Bialecki | Co-founder, chair and co-CEO; CEO from 2012 to 2025 | |
Chano Fernández | Co-CEO since January 2026; formerly co-CEO of Workday | |
Ed Hallen | Co-founder and chief strategy officer; director | |
Erica Smith | Chief financial officer since September 1, 2026; formerly CFO of CyberArk | |
Elias Torres | Chief product officer, from the August 2026 Agency acquisition | |
Surabhi Gupta | Chief technology officer | |
Landon Edmond | Chief legal officer and general counsel since December 2020 | |
Carmel Galvin | Chief people officer |
Full bios and contact routes: Klaviyo CEOs Andrew Bialecki and Chano Fernández: email, LinkedIn and bio.
Where is Klaviyo based?
Boston. Its headquarters are at 125 Summer Street, 6th Floor, where it leases about 256,600 square feet. It also has offices in San Francisco, Palo Alto, Denver, London, Sydney, Dublin, Singapore and Paris (SEC).
It had 2,368 employees on December 31, 2025, up from 2,182 a year earlier, most of them in the US (SEC). It cut about 3% of staff in the third quarters of both 2025 and 2026 (SEC).
What is Klaviyo’s email format?
Klaviyo staff use {first}.{last}@klaviyo.com, such as maya.chen@klaviyo.com for a fictional Maya Chen: 63 of the 66 staff addresses in Klaviyo’s public code repositories follow it.
Need | Official address |
|---|---|
Support | In the app, or the ticket form at klaviyo.com/support; no support inbox |
Sales | sales@klaviyo.com, or the demo form |
Press | press@klaviyo.com |
Investors | ir@klaviyo.com |
Phishing and abuse | abuse@klaviyo.com |
All patterns, sending domains and official inboxes: Klaviyo email format.
Key events
Date | Event |
|---|---|
Nov 4, 2026 | Q3 revenue of $387.2M, up 25%; 2026 forecast raised again; new $300M buyback (SEC) |
Sep 1, 2026 | Erica Smith becomes CFO, succeeding Amanda Whalen (SEC) |
May 6, 2026 | Shares hit a record low of $15.51 after Q1 results and the CFO’s planned exit (Schaeffer’s) |
Mar 2, 2026 | Announces a $500M buyback (SEC) |
Feb 10, 2026 | 2025 revenue passes $1.2B, up 32% (SEC) |
Jan 1, 2026 | Bialecki and Fernández become co-CEOs (SEC) |
May 14, 2025 | Bialecki sells 11M shares in a public offering, to pay the taxes on exercising options that were about to expire (SEC) |
Feb 19, 2025 | Reports crossing a $1B revenue run rate (SEC) |
Sep 20, 2023 | Lists on the NYSE at $30 a share (Klaviyo) |
Mar 15, 2023 | Cuts about 8% of staff (SEC) |
Aug 2022 | An attacker uses an employee’s stolen login to download list data from 38 customer accounts (Klaviyo) |
Jul 28, 2022 | Shopify invests $100M and makes Klaviyo its recommended email provider for Shopify Plus (SEC) |
May 18, 2021 | Raises $320M at $9.15B (Summit) |
Nov 17, 2020 | Raises $200M at $4.15B, led by Accel (TechCrunch) |
Apr 8, 2019 | Raises $150M from Summit Partners, its first big round (TechCrunch) |
2012 | Founded in Boston by Andrew Bialecki and Ed Hallen (Klaviyo) |
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