{"date":"2026-10-18","description":"Young companies worth knowing, grouped by the theme they bet on, with where each was first spotted and its sources.","themes":[{"slug":"computers-and-runtimes-for-fleets-of-agents","startups":[{"first_seen":"2026-10-18","name":"Maritime","new_this_week":true,"pitch":"Fully managed cloud that gives each AI agent its own persistent VM, from $1 per agent per month.","sources":["https://www.ycombinator.com/launches/VQm-maritime-fully-managed-cloud-for-running-ai-agents-at-scale","https://www.ycombinator.com/companies/maritime"],"theme_id":"agents-become-long-running-parallel-and-stateful","url":"https://maritime.sh/","yc_batch":"F26"},{"first_seen":"2026-10-18","name":"herdr","new_this_week":true,"pitch":"Open-source runtime that coding-agent sessions run on.","sources":["https://www.ycombinator.com/companies/herdr"],"theme_id":"agents-become-long-running-parallel-and-stateful","url":"https://herdr.dev/","yc_batch":"F26"},{"confidence":"reported","first_seen":"2026-10-18","name":"doxx.net","new_this_week":true,"pitch":"Private networks built around AI agents.","round":"$38M Series A led by a16z","round_source":"https://agentunfolded.com/ai-agent-funding-october-2026/","sources":["https://agentunfolded.com/ai-agent-funding-october-2026/","https://venturecapitaltracker.com/startup/doxx-net"],"theme_id":"infrastructure-strains-under-agent-scale-code","url":"https://doxx.net/"}],"status":"rising","summary":"Developers now run many coding agents for hours at a time, and each one needs its own lasting, isolated computer and network.","title":"Computers and runtimes for fleets of agents"},{"slug":"security-risk-and-insurance-for-agents","startups":[{"confidence":"confirmed","first_seen":"2026-10-18","name":"Armadin","new_this_week":true,"pitch":"Autonomous security testing: agent swarms that find and validate exploitable attack paths for enterprises.","round":"$255.5M Series B co-led by a16z and Accel","round_source":"https://www.prnewswire.com/news-releases/armadin-raises-255-5-million-series-b-to-scale-effective-autonomous-security-302895278.html","sources":["https://agentunfolded.com/ai-agent-funding-october-2026/","https://www.armadin.com/blog-posts/investors-back-armadin-platform-strategy-with-new-round-of-funding"],"theme_id":"safety-security-and-provenance-go-operational","url":"https://www.armadin.com/"},{"confidence":"confirmed","first_seen":"2026-10-18","name":"Rein","new_this_week":true,"pitch":"Security platform for agentic AI that sees beyond the prompt.","round":"$25M Series A","round_source":"https://reinsec.io/blog/series-a/","sources":["https://reinsec.io/blog/series-a/"],"theme_id":"safety-security-and-provenance-go-operational","url":"https://reinsec.io/"},{"confidence":"reported","first_seen":"2026-10-18","name":"Harbor","new_this_week":true,"pitch":"Measures, mitigates and insures the risks of AI agents for banks, insurers and other regulated firms.","round":"$10M seed led by Base10, Abstract and 8VC","round_source":"https://www.insurancejournal.com/news/national/2026/10/13/888747.htm","sources":["https://agentunfolded.com/ai-agent-funding-october-2026/","https://harbor.ai/"],"theme_id":"safety-security-and-provenance-go-operational","url":"https://harbor.ai/"}],"status":"rising","summary":"Companies now treat agent risk as something to test, control and insure, and this theme drew the biggest round of the month.","title":"Security, risk and insurance for agents"},{"slug":"agents-built-for-one-industry","startups":[{"confidence":"confirmed","first_seen":"2026-10-18","name":"Vesta","new_this_week":true,"pitch":"AI-native mortgage loan origination system with agents across lending workflows.","round":"$30M led by Conversion Capital","round_source":"https://www.vesta.com/blog/vesta-raises-30-million-to-scale-its-ai-agents-across-mortgage-lending","sources":["https://techcrunch.com/2026/10/08/vesta-raises-30m-as-lenders-adopt-ai-agents/"],"url":"https://www.vesta.com/"},{"confidence":"confirmed","first_seen":"2026-10-18","name":"Siena AI","new_this_week":true,"pitch":"Empathic customer-experience agents for commerce brands.","round":"$17M Series A","round_source":"https://www.siena.cx/blog/siena-raises-17m-series-a","sources":["https://agentunfolded.com/ai-agent-funding-october-2026/"],"url":"https://www.siena.cx/"},{"first_seen":"2026-10-18","name":"Grep AI","new_this_week":true,"pitch":"Self-improving agents that move repeated steps from model calls into code, getting cheaper at the same task.","sources":["https://www.ycombinator.com/launches/Ua6-grep-ai-self-improving-agents-that-get-smarter-and-cheaper-at-the-same-task","https://www.ycombinator.com/companies/grep-ai"],"url":"https://grep.ai/","yc_batch":"F26"}],"status":"rising","summary":"Vertical agents replace slow back-office work, and customers are investing in the startups themselves.","title":"Agents built for one industry"},{"slug":"agents-running-sales-and-customer-success","startups":[{"first_seen":"2026-10-18","name":"Frontrunner","new_this_week":true,"pitch":"'Cursor for GTM': AI agents for sales teams.","sources":["https://www.ycombinator.com/launches/VXB-frontrunner-cursor-for-gtm","https://www.ycombinator.com/companies/frontrunner"],"url":"https://usefr.com/","yc_batch":"F26"},{"first_seen":"2026-10-18","name":"Quivly","new_this_week":true,"pitch":"AI workforce for post-sales, from onboarding to renewal.","sources":["https://www.ycombinator.com/launches/VN0-quivly-ai-agents-that-run-everything-after-the-sale-from-onboarding-to-renewal"],"url":"https://www.quivly.ai/"}],"status":"rising","summary":"Agents now run go-to-market and post-sale work end to end, from pipeline to renewal.","title":"Agents running sales and customer success"},{"slug":"open-models-moving-into-enterprises","startups":[{"confidence":"reported","first_seen":"2026-10-18","name":"Nous Research","new_this_week":true,"pitch":"Open-model lab behind Hermes, now selling Hermes for Businesses agents.","round":"$90M at a $1.5B valuation","round_source":"https://techcrunch.com/2026/10/07/nous-research-confirms-it-hit-1-5b-valuation-launches-ai-agents-for-business-users/","sources":["https://techcrunch.com/2026/10/07/nous-research-confirms-it-hit-1-5b-valuation-launches-ai-agents-for-business-users/"],"theme_id":"open-weight-models-reach-the-frontier","url":"https://nousresearch.com/"},{"confidence":"reported","first_seen":"2026-10-18","name":"Manus","new_this_week":true,"pitch":"General-purpose autonomous agent that does hands-on work for users and teams.","round":"$500M+ after planned Meta acquisition fell through","round_source":"https://www.reuters.com/world/china/manus-raises-more-than-500-million-after-meta-exit-2026-10-08/","sources":["https://agentunfolded.com/ai-agent-funding-october-2026/"],"url":"https://manus.im/"}],"status":"rising","summary":"Open-model labs are raising big rounds and packaging agents for business users.","title":"Open models moving into enterprises"}],"title":"Startups · Arun Arumugam","url":"https://arun477.github.io/startups/"}