Composer Crosses the Chasm: Klaviyo's Agent Layer Turns Experiment into Engine
30-day agent adoption, an 8-figure land, a new CPO and CFO — and a deliberate margin reset the market is only now pricing
KVYO · Earnings Call · 2026-08-05
For Klaviyo, Q2 2026 is the quarter the agent story stopped being a roadmap slide and started being a demand line. Revenue of $370.6 million grew 26% year-over-year and beat guidance, but the tape's attention was on Composer — the agentic campaign harness that hit general availability to all customers only in late June — and on Customer Agent, the always-on digital representative. The company signed its largest deal ever, an 8-figure, 2-year omnichannel contract, raised full-year revenue guidance, and, in the same breath, lowered its operating-income guide. That tension — growth now, margin later — is the whole story of this call.
The 30-day agent arc
The adoption numbers are unusually specific for a product a month old. Andrew Bialecki led with:use Composer is a genuinely new theme for this company — it does not appear anywhere in Klaviyo's prior nine quarters of curated keywords, and neither does resolution rate, the metric doing the heavy lifting for Customer Agent. Resolution volumes are up nearly 80% since early June, and one large enterprise customer went from a 52% to a 79% autonomous resolution rate in seven days after Klaviyo deployed an agent that trains other agents. Quality is improving fast: the share of generated campaigns that brands actually use rose from 35% to 46% in a few weeks ““as a result of improvements to taste, alignment and validation” — Andrew Bialecki, Co-Founder and Co-CEO · 2026-08-05”. The monetization frame is deliberate. Composer is credit-based — everyone got 10,000 credits to experiment, and some customers are already paying during the trial; Customer Agent is outcome-based, charging only when the agent resolves a conversation unassisted. Andrew's framing ties it all back to usage: ““customers, they’re rate limited by the ideas they have and then how fast they can execute” — Andrew Bialecki, Co-Founder and Co-CEO · 2026-08-05” — so a capable agent should expand spend per profile and per close loop. None of this is happening in a vacuum. Globally, Agent stack and “Agentic Operating System” have been surfacing as top-25 market keywords in adjacent quarters, so Klaviyo is riding — and in places leading — a genuine platform shift rather than inventing a niche.In the first month since launch, Composer already has over 95,000 users. And very encouragingly, nearly 1/4 have turned into recurring weekly Composer users.
Enterprise, leadership, and the price of the next S-curve
The go-to-market overhaul that Co-CEO Chano Fernandez has been running for two quarters is showing up in hard numbers: customers with $50K+ ARR grew 36% year-over-year to 4,477 and now sit at roughly 40% of total ARR. The quarter brought the first 8-figure deal ever (a top TikTok Shop seller running email, text, and marketing analytics on one platform), Warner Music Group, Claire's (replacing two legacy vendors), a first NFL franchise, and a global AWS Marketplace win at Country Road Group. ““In the enterprise… we’re winning new customers from larger legacy vendors” — Luciano Fernandez Gomez, Co-CEO · 2026-08-05” — and large enterprise has become a fixture of the company's top-momentum keywords. The leadership changes are the real tell of intent. Klaviyo is acquiring the AI-agent team Agency, with founder Elias Torres joining as Chief Product Officer — a first for the company. ““When it comes to agents… we have a lot of surface area, a lot of ambition, and this is going to help us just go faster” — Andrew Bialecki, Co-Founder and Co-CEO · 2026-08-05” — Andrew. Erica Smith takes over as CFO on September 1, ending Amanda Whalen's four-plus-year run. A co-CEO founder, a new CPO, and a new CFO is as close to a second act as a public company can draft. The financial framing, though, is more measured. ““Net revenue retention was 109% in Q2, reflecting strengthening gross retention, increasing text messaging expansion and our strongest quarter of cross-sell since our IPO” — Amanda Whalen, Chief Financial Officer · 2026-08-05” — but Amanda was explicit that the tail of last year's profile-enforcement drag lingers through Q1 next year. Guidance tells the same story: revenue was ““raised by $12 million at the midpoint” — Amanda Whalen, Chief Financial Officer · 2026-08-05” to a $1.526-1.534 billion range (24% growth), while non-GAAP operating income was cut $10 million to $212-218 million, roughly 14% margin — the $10-12 million agency cost plus deeper product innovation spend. It is a deliberate downshift in near-term leverage to buy the next S-curve, and it stands in contrast to last quarter's message that guidance would be ““closer to the pin this quarter by design” — Amanda Whalen, CFO · 2026-05-05” — precision has yielded to ambition.The margin math of going omnichannel
The margin reset is structural, not accidental. Non-GAAP gross margin fell 3 points to 73.4%, driven by the rapid growth of text messaging and the carrier fees Klaviyo chose to absorb in prior quarters:That is a quiet but real pivot. In May, Amanda said Klaviyo ““has taken the strategic choice not to pass through those carrier fees” — Amanda Whalen, CFO · 2026-05-05”; now that text is a bigger share of the mix — and text messaging expansion is the strongest NRR lever — it is a pass-through, framed as “neutral to 2026 revenue and gross margin” but a positive for channel unit economics, with mobile pricing mechanics also de-frictioned. The trade-off is management's own: text carries lower gross margin but better retention — multiproduct customers retain more than 6 points better — and a long runway to cross-sell higher-margin products like marketing analytics. The latest filed quarter shows gross margin at 75.1%, down from a 77.6% peak, and management's Q2 print (73.4%) confirms the trend is steepening as the channel mix shifts toward messaging. The topline shape is the counterweight: quarterly revenue keeps compounding at 24-28% growth even as the narrative turns to margin compression. Price-to-revenue has roughly halved from the post-IPO range of ~4.6x even as product adoption accelerates. This is the backdrop for the tape move: shares are up ~12% over the last 90 days but still sit 62% below the February 2025 high, and management is voting with the balance sheet — ~$240 million of buybacks in the quarter, leaving $160 million of capacity — effectively agreeing with the market that the multiple, not the business, was the bubble. The change at Klaviyo is real and it is early. Agents have gone from demo to default in thirty days, the org has added the leadership to institutionalize them, and the company has explicitly traded a point of operating margin for the right to build the next layer. Whether Composer converts from trial credits to paid scale by Q4 is the open question; every leading indicator — weekly retention, campaign acceptance, resolution rates — says it is moving in that direction.In Q3, we updated our mobile pricing to pass the higher carrier fees on to customers going forward.