--- title: Lightsage raises $4M to build the growth stack for... description: San Francisco startup Lightsage raised a $4M seed round led by Nexus Venture Partners, with angel backing from former Salesforce CTO Steven Tamm, Postman CEO... canonical: https://daily.dev/posts/lightsage-raises-4m-to-build-the-growth-stack-for-software-s-newest-customer-yimygilu2 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Lightsage raises $4M to build the growth stack for software’s newest customer | daily.dev og:description: San Francisco startup Lightsage raised a $4M seed round led by Nexus Venture Partners, with angel backing from former Salesforce CTO Steven Tamm, Postman CEO... og:url: https://daily.dev/posts/lightsage-raises-4m-to-build-the-growth-stack-for-software-s-newest-customer-yimygilu2 og:image: https://api.daily.dev/og/posts/YImygilU2.png og:image:alt: Lightsage raises $4M to build the growth stack for software’s newest customer og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Lightsage raises $4M to build the growth stack for software’s newest customer **[The Next Web](https://daily.dev/sources/tnw)** · 2 min read · 1 upvotes · 0 comments ## Summary San Francisco startup Lightsage raised a $4M seed round led by Nexus Venture Partners, with angel backing from former Salesforce CTO Steven Tamm, Postman CEO Abhinav Asthana, Apollo CEO Matt Curl, and DocuSign president Robert Chatwani. The company builds what it calls Agent-Led Growth: running simulations across coding agents (Claude Code, Codex, Cursor, GitHub Copilot, OpenCode) to find where agents fail to discover, install, or use a company's software, then helping teams fix discoverability, docs, auth, or API issues. Customers include Firecrawl, Reducto, Daytona, Rime, and Tinyfish. The piece also flags that agents autonomously paying for software remains legally murky in Europe, since PSD2's strong customer authentication rules have no carve-out for agent-delegated payments, unlike Robinhood's agent trading feature or Meow's agentic banking platform. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is Agent-Led Growth and which company coined the term? Agent-Led Growth is a category coined by Lightsage, a San Francisco startup that raised $4M led by Nexus Venture Partners. It describes helping software get discovered, installed, and used by AI coding agents rather than human visitors. Lightsage runs simulations across tools like Claude Code, Codex, Cursor, GitHub Copilot, and OpenCode to find where agents fail to complete tasks with a company's software. _Teams optimizing developer tools for agent adoption can follow this emerging space on daily.dev._ ### Does PSD2 strong customer authentication have an exception for AI agents making payments? No, there is no agent-specific carve-out in PSD2. Strong customer authentication still applies when software makes a payment on a person's behalf, leaving open questions about who provides the payment service, who controls the funds, and what counts as valid authorization once the act is delegated to an agent. Robinhood already lets AI agents trade stocks and spend on a card, making the issue concrete rather than theoretical. _Developers building payment-capable agents can track how PSD2 compliance questions evolve on daily.dev._ ### Which coding agent tools does Lightsage support for testing agent-led software adoption? Lightsage supports Claude Code, Codex, Cursor, GitHub Copilot, and OpenCode. It hands these agents real tasks against a company's software and records where they break, whether from poor discoverability, documentation gaps, authentication issues, a broken API endpoint, or an incompatible MCP server, then measures improvement after fixes. _Anyone choosing among coding agents can compare capabilities and gaps on daily.dev._ ## Similar posts on daily.dev - [Datadog veterans launch AI coding startup Niteshift on a bet against Big AI lock-in](https://daily.dev/posts/datadog-veterans-launch-ai-coding-startup-niteshift-on-a-bet-against-big-ai-lock-in-gs7f2xz2a) · TechCrunch · 1 upvotes · 0 comments - [Ex-DeepMind founders raise $20M for Airspeed's AI sales agents](https://daily.dev/posts/ex-deepmind-founders-raise-20m-for-airspeed-s-ai-sales-agents-3ld000ryi) · The Next Web · 0 upvotes · 0 comments --- Tags: [#startup](https://daily.dev/tags/startup), [#ai-agents](https://daily.dev/tags/ai-agents), [#venture-capital](https://daily.dev/tags/venture-capital), [#mcp](https://daily.dev/tags/mcp) [View this post on daily.dev](https://daily.dev/posts/lightsage-raises-4m-to-build-the-growth-stack-for-software-s-newest-customer-yimygilu2) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Lightsage raises $4M to build the growth stack for software’s newest customer","url":"https://daily.dev/posts/lightsage-raises-4m-to-build-the-growth-stack-for-software-s-newest-customer-yimygilu2","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/lightsage-raises-4m-to-build-the-growth-stack-for-software-s-newest-customer-yimygilu2"},"datePublished":"2026-09-08T13:11:11.823Z","dateModified":"2026-09-13T19:35:17.981Z","description":"San Francisco startup Lightsage raised a $4M seed round led by Nexus Venture Partners, with angel backing from former Salesforce CTO Steven Tamm, Postman CEO...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0a0b1992b1f9df4eae24ada748fc9ca2?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0a0b1992b1f9df4eae24ada748fc9ca2?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"The Next Web","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"The Next Web","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/tnw","url":"https://daily.dev/sources/tnw"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/lightsage-raises-4m-to-build-the-growth-stack-for-software-s-newest-customer-yimygilu2","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"startup,ai-agents,venture-capital,mcp","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"The Next Web","item":"https://daily.dev/sources/tnw"},{"@type":"ListItem","position":3,"name":"Lightsage raises $4M to build the growth stack for software’s newest customer"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/lightsage-raises-4m-to-build-the-growth-stack-for-software-s-newest-customer-yimygilu2#faq","mainEntity":[{"@type":"Question","name":"What is Agent-Led Growth and which company coined the term?","acceptedAnswer":{"@type":"Answer","text":"Agent-Led Growth is a category coined by Lightsage, a San Francisco startup that raised $4M led by Nexus Venture Partners. 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