Lightsage (formerly Sapient)

Agent-Led Growth Platform. Improve how coding agents discover and use your products, API, MCP and CLI. Creators of

[Lightsage (formerly Sapient) @lightsagehq]

Excited to be building the Infra for Agent-Led Growth! 🔥

[Jun @jun_liang_sf]

We just raised $4M at @lightsagehq , led by @nexusvp , to build the growth stack for internet’s newest customer: AI agents.

Claude Code, Codex, Cursor and other agents can already discover products, compare alternatives, read documentation, install SDKs, call APIs and start using software on behalf of humans. Soon, they’ll increasingly transact too and that changes how internet companies grow.

For decades, companies built growth infrastructure around humans. PLG helped humans adopt products. Now there’s a new journey to optimize: Can an AI agent discover you, choose you, successfully use you, and eventually pay for you?

We call this Agent-Led Growth.

Lightsage helps companies get discovered, recommended and used by agents
→ Agent Discovery - when and why agents recommend you vs. competitors
→ Agent Experience - whether agents can successfully use your APIs, SDKs, CLIs, MCP servers and agent skills
→ Agent Analytics - what real agents do when they reach your website, docs and product. and most recently agent-attributed traffic conversion.

Companies including @firecrawl , @reductoai , @daytonaio , @rimelabs , @Tiny_Fish and @insforge are already using Lightsage to build their agent-led growth strategy and improve their agent journey.

We’re incredibly grateful to have Nexus lead this round alongside these amazing founders and operators.
- Former Salesforce CTO Steven Tamm
- Postman CEO @a85
- Apollo CEO Matt Curl
- DocuSign President Robert Chatwani
- Former GitLab Head of Growth @HilaQu
- Resend CEO @zenorocha
- Firecrawl Co-founder @ericciarla
- Daytona CEO @ivanburazin
- Tinyfish COO @shuhao_friday
- Adam Frankl
and many more!

As agents increasingly discover, evaluate, use and pay for products on our behalf, we believe every company will need to understand and optimize for the agent channel.

That’s what we’re building Lightsage for.

Huge thank you to my co-founder Sean Er, customers, early investors @AlchemistAcc and everyone who believed in us early. Honoured to be featured in @Forbes .

We’re just getting started.
https://t.co/xPRSFz8UJD

[Darius @dariusogenyi]

some of the hottest early-stage rounds raised last week:

> @lightsagehq raised $4M in seed funding led by NexusVP.

> @highstock_x raised $30M in Series A funding led by a16z for its AI-powered marketplace.

> @TeamCloudNC raised $20M in a Series B extension.

> @BluecoreCo raised $50M in seed funding just two months after emerging from stealth.

> @lightfld raised $47M in Series A funding led by a16z.

> @mavenrobotics emerged from stealth with a $100M Series A.

> @poseidonaero raised $60M in Series A.

see the rest of the rounds raised last week, sorted by stage here ⬇️

https://t.co/HJx5U5hGp4

[Resend @resend]

We're delighted that @lightsagehq is joining us as a Bronze sponsor of Resend Forward.

They help companies observe and improve their agent experience. Get discovered, recommended, and used by agents.

[Guzman Pintos @guzmanpintos]

@jun_liang_sf @lightsagehq @tenki wouldn't be possible to build w/o your tooling

[Guzman Pintos @guzmanpintos]

Tenki scores #1 in CLI agent usage across all sandbox providers on https://t.co/zw2rpSiYBU by @lightsagehq

[Jun @jun_liang_sf]

Can Claude Code and Codex actually use your MCP server? (October Edition)

Only 10 out of 48 MCP servers scored 80+. 22 categories. 100+ eval runs. A real-world developer task for every MCP server, each in its own isolated sandbox.

Category leaders
- Payment: @stripe
- Storage: @Box
- Auth: @descopeinc
- Email: @agentmail
- Document Parsing: @ExtendHQ
- Cloud Hosting: @render
- Voice TTS: @ElevenLabs
- Webscraping: @fast_crw
- Meeting Bots: @MeetgeekA
- Search: @tavilyai (Claude Code), @ExaAILabs (Codex)
- Vector DB: @qdrant_engine (Claude Code), @pinecone (Codex)
- Sandbox: @e2b (Claude Code), @daytonaio (Codex)

Honourable mentions: @firecrawl, @youdotcom, @resend , @clerk, @cartesia, @reductoai

Full evals at https://t.co/EstAOpAQ28 . Scores are based on discoverability, usability, tool calls, and errors.

*All runs are independent and in isolated sandboxes, powered by @lightsagehq Agent-Led Growth and Agent Experience infrastructure.

@ericciarla, @zenorocha, @ivanburazin, @adisingh, @rauchg, @grinich, @MelGoesTech, @JaySahnan, @NyahMacklinDev, @victordubeux, @Jingg_n_Tonic

[Lightsage (formerly Sapient) @lightsagehq]

Latest results for https://t.co/CFjp0gzN1R is out!

120+ production APIs. 1000+ eval runs. 36 categories. >$5000 spent.

Check if your API is discoverable and used by coding agents like Claude Code and Codex!

[Jun @jun_liang_sf]

Can Claude Code and Codex actually use your API? (October Edition)

Only 17 out of 121 APIs scored 80+. Is yours one of them? I ran Claude Code (Sonnet 5) and Codex (GPT-6 Sol) against 120+ live production APIs. 1000+ eval runs. 36 categories. > $5000 spent. A real-world developer use case for every API, and their own isolated sandbox. This is the most comprehensive run we've ever done.

Claude Code and Codex has its own category leaders.
- Payment: @stripe
- Search: @firecrawl
- Sandbox: @daytonaio
- Inference: @OpenRouter
- Auth: @WorkOS , @auth0
- Vector DB: @trychroma
- Voice TTS: @ElevenLabs
- Voice STT: @DeepgramAI
- Voice Telephony: @Telnyx
- Document Parsing: @reductoai
- Browser: @browserbase
- Email: @agentmail
- Graph DB: @neo4j
- Meeting Bots: @meetstreamai
- Durable Workflow: @PrefectIO

Honourable mentions: @AssemblyAI , @Vapi_AI , @temporalio , @FireworksAI_HQ , @superserve_ai, @resend , @pinecone , @recallai , @PayPal , @Tiny_Fish

Full evals at https://t.co/RoAYrnP9ln. Scores are based on discoverability, usability, tool calls, and errors.
*All runs are independent and in isolated sandboxes, powered by @lightsagehq Agent Experience infrastructure.

@ericciarla @zenorocha @ivanburazin @adisingh @rauchg @grinich @aditabrm @vedantvyas

[Lightsage (formerly Sapient) @lightsagehq]

@haakamaujla @lightsagehq now support AgentID too🔥

[Jun @jun_liang_sf]

We just raised $4M at @lightsagehq , led by @nexusvp , to build the growth stack for internet’s newest customer: AI agents.

Claude Code, Codex, Cursor and other agents can already discover products, compare alternatives, read documentation, install SDKs, call APIs and start using software on behalf of humans. Soon, they’ll increasingly transact too and that changes how internet companies grow.

For decades, companies built growth infrastructure around humans. PLG helped humans adopt products. Now there’s a new journey to optimize: Can an AI agent discover you, choose you, successfully use you, and eventually pay for you?

We call this Agent-Led Growth.

Lightsage helps companies get discovered, recommended and used by agents
→ Agent Discovery - when and why agents recommend you vs. competitors
→ Agent Experience - whether agents can successfully use your APIs, SDKs, CLIs, MCP servers and agent skills
→ Agent Analytics - what real agents do when they reach your website, docs and product. and most recently agent-attributed traffic conversion.

Companies including @firecrawl , @reductoai , @daytonaio , @rimelabs , @Tiny_Fish and @insforge are already using Lightsage to build their agent-led growth strategy and improve their agent journey.

We’re incredibly grateful to have Nexus lead this round alongside these amazing founders and operators.
- Former Salesforce CTO Steven Tamm
- Postman CEO @a85
- Apollo CEO Matt Curl
- DocuSign President Robert Chatwani
- Former GitLab Head of Growth @HilaQu
- Resend CEO @zenorocha
- Firecrawl Co-founder @ericciarla
- Daytona CEO @ivanburazin
- Tinyfish COO @shuhao_friday
- Adam Frankl
and many more!

As agents increasingly discover, evaluate, use and pay for products on our behalf, we believe every company will need to understand and optimize for the agent channel.

That’s what we’re building Lightsage for.

Huge thank you to my co-founder Sean Er, customers, early investors @AlchemistAcc and everyone who believed in us early. Honoured to be featured in @Forbes .

We’re just getting started.
https://t.co/xPRSFz8UJD

[Abhishek Sharma @oneabhishek]

The internet brought the economy online, with humans discovering, choosing, and transacting through digital channels. That created an enormous marketing tech industry focused on understanding and optimizing the human journey.

AI is now shifting that agency from humans to agents that can discover, evaluate, and act on a customer’s behalf.

@lightsagehq is building the intelligence infrastructure for this new era of autonomous browsing, helping companies optimize for agent conversion, not just awareness.

That's why @Mayitbe524 and I are excited to lead the seed round of Lightsage.

Congrats, @jun_liang_sf, Sean, and Team Lightsage!

Excited for what's ahead! 🚀

@nexusvp

[Nexus @nexusvp]

We're excited to lead @lightsagehq 's $4M round as they build the infrastructure for Agent-Led Growth!

Coding agents now discover products, choose SDKs, and call APIs on their own. Software has a new customer, and it doesn't behave like the old one. Agent Experience is becoming what Developer Experience once was.

Lightsage shows companies how agents see their product: where they succeed, break, and why, across docs, APIs, SDKs, CLIs, and MCP servers, starting with developer tools, built for e-commerce, payments, B2B software, and consumer businesses next.

Congratulations to @jun_liang_sf , Sean Er and the Lightsage team.

@oneabhishek | @Mayitbe524

[Lightsage (formerly Sapient) @lightsagehq]

Excited to be working with the @auth0 team to push the frontier in agent-led growth and agent experience!!

[Auth0 @auth0]

@jun_liang_sf @lightsagehq @nexusvp Congrats to the @lightsagehq team on the $4M raise! 🎉

Agent-led growth is a fascinating shift. The agent experience doesn’t stop at discovery, it needs to extend all the way to securely using the product. 🔐

[Colin Lowenberg @opencolin]

@jun_liang_sf @lightsagehq @nexusvp Already setup https://t.co/olYk9lnb0B for @nebiusai and @tavily and now using it at @tenki

[Andrew Wong @41five]

Had a blast talking “company brain” at @lightsagehq's demo night yesterday!

Huge thanks to @jun_liang_sf and @sean__er for having me. And congrats on the funding! Great guys building some seriously cool stuff 🚀

[ojusave @ojusave]

Congrats my friend @jun_liang_sf and @lightsagehq on the recent raise!

[Lightsage (formerly Sapient) @lightsagehq]

We just raised $4M at Lightsage, led by @nexusvp, to build the growth stack for internet’s newest customer: AI agents.

Claude Code, Codex, Cursor and other agents can already discover products, compare alternatives, read documentation, install SDKs, call APIs and start using software on behalf of humans. Soon, they’ll increasingly transact too and that changes how internet companies grow.

For decades, companies built growth infrastructure around humans. PLG helped humans adopt products. Now there’s a new journey to optimize: Can an AI agent discover you, choose you, successfully use you, and eventually pay for you?

We call this Agent-Led Growth.

Lightsage helps companies get discovered, recommended and used by agents
→ Agent Discovery - when and why agents recommend you vs. competitors
�� Agent Experience - whether agents can successfully use your APIs, SDKs, CLIs, MCP servers and agent skills
→ Agent Analytics - what real agents do when they reach your website, docs and product. and most recently agent-attributed traffic conversion.

Companies including @firecrawl, @reductoai, @daytonaio, @rimelabs, @Tiny_Fish and @insforge are already using Lightsage to build their agent-led growth strategy and improve their agent journey.

We’re incredibly grateful to have Nexus lead this round alongside these amazing founders and operators.
- Former Salesforce CTO Steven Tamm
- Postman CEO @a85
- Apollo CEO Matt Curl
- DocuSign President Robert Chatwani
- Former GitLab Head of Growth @HilaQu
- Resend CEO @zenorocha
- Firecrawl Co-founder @ericciarla
- Daytona CEO @ivanburazin
- Tinyfish CPO @shuhao_friday
- Former VP Marketing Adam Frankl
- Former Netreo CEO Jasmin Young (Sothis Labs)
and many more!

As agents increasingly discover, evaluate, use and pay for products on our behalf, we believe every company will need to understand and optimize for the agent channel.

That’s what we’re building Lightsage for.

Huge thank you our customers, early investors @AlchemistAcc and everyone who believed in us early.

Honoured to be featured in Forbes. https://t.co/loheF7zQOp

We’re just getting started.

https://t.co/kJQq0wROGw

@jun_liang_sf @sean__er

[Lightsage (formerly Sapient) @lightsagehq]

Scan your website here: https://t.co/hdVWGpfOQE

[Lightsage (formerly Sapient) @lightsagehq]

Can agents pay for your product?

Introducing Agent Payments Arena.

We benchmarked 2,353 companies across x402, MPP, UCP, ACP and more to measure whether AI agents can discover, access, use, and pay for their products.

- Humans: discover → click → buy
- Agents: discover → evaluate → use → pay

Check your Agent Payability score. Link in comments #alg #agentpayments #x402 #agentexperience

[Lightsage (formerly Sapient) @lightsagehq]

Explore the full benchmark at https://t.co/TsMwNc9Nk0.

Reach out or comment below if you'd like to be added to the list.

[Jun @jun_liang_sf]

🚀 Introducing Agent Experience Arena

Your next user is no longer just a human.

It's an AI agent.

We ran 3,000+ evaluations across 143 developer companies to measure whether Claude Code and Codex can successfully discover, evaluate, and use your software.

🏆 Current Top 10: @ElevenLabs, @stripe, @browserbase, @browser_use, @pinecone, @twilio, @resend, @circle, @temporalio, @clerk

Explore the full benchmark at https://t.co/07XMSPj48v by @usesapient .

Every Agent Experience score is based on:
- Agent Discoverability
- Agent Usability
- Tool Calls
- Error Rates

AI agents are becoming a new growth channel for software.

The companies that win won't just build the best products.

They'll build products that AI agents choose to discover, recommend, and use.

I'd love your feedback. If your company isn't listed yet, let us know so we can benchmark it.

Comment below and share how you're optimizing your product for agents today.