Report No. 015 · Sat, 26 Sept 2026

Startup Scout: Island

Pick of the day

Island

Dallas-based enterprise browser company that just raised $400M at a $6.4B valuation to extend its security platform into governing AI agents across the workplace.

island.io

Cybersecurity / Enterprise Browser · Dallas

Series F · $400M

39/50Scout score

Problem: 7
Traction: 9
Founders: 9
Market: 8
Novelty: 6

Why today

Island's $400 million Series F, announced September 24, stood out on a day that also produced a $340 million raise for healthcare-AI scribe Heidi Health and a $75 million round for AI data infrastructure startup Firecrawl, because the numbers behind it are unusually concrete for a private cybersecurity company: roughly $200 million in annual revenue growing near 100 percent a year, more than 450 customers including eight of the world's ten largest banks, and headcount that doubled to 1,000 people in a year. The round more than doubles Island's 2024 valuation of $3 billion, led by Evolution Equity Partners with a long list of existing backers including Sequoia, Coatue and Insight Partners returning to write bigger checks, and it arrives as Island repositions its browser as an agentic control plane meant to police AI agents the same way it already polices human employees.

Problem

Corporate work now happens almost entirely inside a browser tab, yet the browser itself has long been the weakest link in enterprise security, letting sensitive data leak through copy-paste, downloads, screenshots and unmanaged extensions regardless of what firewalls or endpoint agents a company runs. Contractors, BYOD devices and SaaS sprawl make the problem worse, since IT teams often cannot install traditional security agents on devices they do not own. The rise of AI agents that click, type and browse on a worker's behalf adds a new twist: those actions need the same audit trail and policy enforcement as a human, but through channels most security stacks were never built to see.

Product

Island builds a Chromium-based enterprise browser that enforces data-loss-prevention, access and compliance policies directly at the point of work, without requiring a separate endpoint agent, so it can secure contractor laptops and BYOD devices that IT does not fully control. With the Series F, Island is extending that same policy engine into what it calls an agentic control plane, applying one consistent set of rules and an audit trail across browsers, endpoints, applications, networks and data, whether the action originates from a human or an AI agent operating autonomously inside those same workflows.

Traction

Island says it now serves more than 450 customers spanning every industry vertical and company size, including Fortune 1000 enterprises, government agencies and universities, with named customers including Pfizer, Chipotle, American Airlines and eight of the world's ten largest banks. The company has grown revenue to roughly $200 million annually, expanding at close to 100 percent year over year, and has scaled headcount to about 1,000 employees, up from roughly 500 a year earlier. CEO Mike Fey has said the company plans to add another 500 employees by mid-2027 to support that growth.

Team

Island was co-founded in 2020 by CEO Mike Fey, the former president and chief operating officer of Symantec, and CTO Dan Amiga, a veteran of Israel's IDF 8200 signals-intelligence unit who previously built remote-browser-isolation company Fireglass, which Symantec acquired for a reported $250 million in 2017. That prior exit and Fey's enterprise security pedigree gave the pair credibility with large enterprise buyers from Island's earliest days, a factor investors have repeatedly cited across the company's funding rounds as it scaled from stealth to a $6.4 billion valuation in roughly five years.

Funding

Island's $400 million Series F, announced September 24, was led by Evolution Equity Partners and values the company at $6.4 billion, more than double the roughly $3 billion valuation it held in 2024. Returning and new backers in the round include Prysm Capital, Sequoia Capital, Coatue Management, Cyberstarts, Insight Partners, J.P. Morgan Growth Equity Partners, Alta Park Capital, Georgian and G Squared, alongside a personal investment from cybersecurity entrepreneur Dmitri Alperovitch. The raise follows a $250 million round in March 2025 at nearly $5 billion and brings Island's total funding to more than $1 billion since its 2020 launch.

Competitors

Island's most direct rival, Talon Cyber Security, was acquired by Palo Alto Networks in 2023 for roughly $625 million and rebranded as Prisma Access Browser, while Google Chrome Enterprise and Microsoft Edge for Business have added zero-trust and data-loss-prevention features of their own without matching the depth of purpose-built enterprise browsers. Island's pitch is that it wins on contractor access and BYOD use cases at regulated organizations where installing a traditional endpoint agent is not an option. Its bigger long-term competitive test is the newly announced agentic control plane, where it will face both browser-security peers and the AI agent platforms it is trying to govern.

VC lens

Would YC fund it? Yes without hesitation on the numbers alone: roughly $200 million in revenue growing near 100 percent a year with repeat, security-credentialed founders is the kind of concrete evidence that would clear YC's bar many times over, though at a $6.4 billion valuation this is squarely a growth-equity story rather than the earliest-stage bets YC itself writes checks into.

Biggest risk: Island's expansion from enterprise browser into policing AI agents pits it against both entrenched browser rivals like Palo Alto's Prisma Access Browser and Chrome Enterprise, and a fast-moving field of AI agent security and observability startups that may define the category on their own terms. If enterprises standardize on governance tools built by the AI agent platforms themselves rather than a browser vendor, Island's newest growth bet could underperform even if its core browser business stays healthy.

Runners-up

Cyera

$400 million Series G extension from Goldman Sachs Alternatives at a flat $12 billion valuation, three months after its $600 million June round, to meet enterprise demand for securing data used by AI agents. (Sep 22)

Confido

$55 million Series B led by Insight Partners for its AI platform that unifies finance, trade spend and operations for more than 250 consumer packaged goods brands. (Sep 22)

Heidi Health

$340 million combined Series C and growth investment, led by Blackbird with a General Catalyst growth tranche, valuing the AI medical scribe at $900 million as it expands into a full clinical AI care partner. (Sep 22)

Firecrawl

$75 million Series B led by Smash Capital to launch Alexandria, a licensed data library for AI agents covering over 113 million papers, code repositories and technical documents. (Sep 22)

Archive

38 reports · click a row to open it

Date	Winner	One-liner	Runners-up
2026-10-19	Modal Labs	750 million dollar Series D led by Accel at a 15.75 billion dollar valuation, as the AI infrastructure startup says its annualized run rate crossed 1 billion dollars with usage tripling in five months, built on serverless GPU access for inference, training and agent sandboxes	OMass Therapeutics, Scanntech, North.cloud, Fortem Technologies
2026-10-18	Mueon	65 million dollar Series A led by Maverick Silicon, as the Portland semiconductor startup founded by two Intel veterans scales Cubelets, modular 3D blocks bundling compute, memory, power and cooling to cut AI data center power and density limits, already in use by AI chip startup d-Matrix	Estuary Biotherapeutics, Fission, Otter Health, HyLight
2026-10-17	Chariot Claims	10 million dollar Series A led by Silverton Partners, as the rebranded ClaimClam legal-tech platform scales automated matching of consumers to mass arbitration and class-action claims over hidden fees and hard-to-cancel subscriptions, building on more than 65,000 claims already processed toward an estimated 92 million dollars in settlements	Marklo, Siena, Rein Security, Peppermint
2026-10-16	Salience Labs	125 million dollar oversubscribed Series B led by Bullhound Capital, as the Oxford-spun-out photonics company wins new backing from AMD Ventures and Intel Capital for all-optical circuit switches meant to break the power and latency ceiling facing electronic switches as AI GPU clusters scale toward tens of thousands of chips	Navra, Type One Energy, Oratomic, Gallatin AI
2026-10-15	Soufflé Therapeutics	135 million dollar Series B led by Juvia Group, as the MIT bioengineer Robert Langer-founded biotech works to deliver RNA medicines to muscle and heart tissue, a problem that has stalled the entire siRNA drug class, backed by more than 3.5 billion dollars in big pharma partnerships before any program has reached the clinic	ICON, Pluto Security, Nous Research, Atomic Machines
2026-10-14	Vitalize	31 million dollar Series A led by Oak HC and FT, as the Y Combinator-backed startup unifying hospital staffing, scheduling, patient flow and capacity management expands after enterprise customers reported cutting manual scheduling work and premium labor spend	Gallatin AI, byteXL, Desible.ai, Credfix
2026-10-13	Universal Quantum	100 million dollar Series A co-led by DCVC and Firgun Ventures, a record raise for a UK quantum computing company, as the University of Sussex spinout races to prove its modular trapped-ion chiplet interconnect can out-scale newly public rivals Quantinuum and IonQ	Atlas Atomics, Type One Energy, Sabi, Catalyst
2026-10-12	Manus	500 million dollar funding round led by Boyu Capital and IDG Capital, the general AI agent's first raise since China blocked Meta's 2 billion dollar bid for the company and barred its founders from leaving the country, as Manus pursues a reported 4 billion dollar valuation on roughly 125 million dollars of annualized revenue	Oratomic, Matchpoint Therapeutics, Oxide Computer, Stuut
2026-10-11	Arena	200 million dollar Series B co-led by Lightspeed Venture Partners and Khosla Ventures at a 3.1 billion dollar valuation, as the company behind the Chatbot Arena leaderboard nearly doubles its valuation in ten months on roughly 100 million dollars of annualized revenue from selling AI evaluation and alignment benchmarking to labs and enterprises, while Scale AI's new Seal Showdown contests its neutral-referee position	Gallatin AI, Rein Security, Rivercell, TeddyHoldings.AI
2026-10-10	Multiply Labs	75 million dollar Series B led by Patrick Soon-Shiong's NantWorks with new investors AstraZeneca, Lingotto, Teradyne and Strange Ventures, as the decade-old biologics-manufacturing robotics company passes 100 million dollars raised on the strength of its first commercial sale, an up to 85 million dollar deal with Retro Biosciences, while competing against well-funded rivals Cellares and Ori Biotech to automate cell and gene therapy production	Zomint, Parakeet Health, OuterSignal, Efficient Computer
2026-10-09	RougeTx	58 million dollar Series A led by BioGeneration Ventures and Angelini Ventures with the European Investment Bank's Aurea facility and Kurma Partners also investing, as the Leiden University Medical Center spinout launches the first disease-modifying candidate for hereditary hemorrhagic telangiectasia, a bleeding disorder with no approved therapies, built on more than two decades of pericyte research	GMI Cloud, Varda Space Industries, doxx.net, Beyond Appliances
2026-10-08	General Medicine	120 million dollar Series B led by Andreessen Horowitz with Eli Lilly and Mercy Health joining, as the PillPack founders' online healthcare marketplace brings total funding to 152 million dollars less than three years after launch on hundreds of thousands of customers and an 80 Net Promoter Score	Noah, Nous Research, Buntar Aerospace, Monid
2026-10-07	Vinci	250 million dollar Series B at a 1.5 billion dollar valuation co-led by Advent, Temasek and Xora Innovation, as the Palo Alto physics foundation model startup jumps from a 46 million dollar seed and Series A disclosed last December to a tenfold valuation leap less than a year later, aiming its technology at chip design incumbents Cadence and Synopsys	Spiko, Hadrian, WhiteLab Genomics, Inbolt
2026-10-06	Pandektes	13.5 million euro Series A led by Munich's Alstin Capital, as the Copenhagen legal-research startup grows revenue sixfold and wins customers switching off LexisNexis, Westlaw, Beck and Karnov with an API-first legal data platform	OneByZero, Fleuret AI, Laki Power, RobCo
2026-10-05	PaleBlueDot AI	200 million dollar Series C at a 3.2 billion dollar valuation led by ComputeCore, as the Palo Alto AI compute platform nearly triples its valuation in under nine months on more than 5 billion dollars of signed customer contracts	Simple Energy, Elio Mortgage, Menos AI, SedMed
2026-10-04	Flow Engineering	50 million dollar Series B at a 750 million dollar valuation co-led by Valor Equity Partners and Atreides Management, as the AI-native systems-engineering platform for hardware teams grows to over 100 million requirements managed and adds General Motors, Anduril and Intuitive Machines as customers less than a year after its Series A	Miter, Kanu AI, Beltic, Satlyt
2026-10-03	EliseAI	350 million dollar round at a 4 billion dollar valuation led by Andreessen Horowitz and Bessemer Venture Partners, as the housing and healthcare conversational AI company nearly doubles its valuation in thirteen months on 200 million dollars of ARR and five straight years of 100 percent revenue growth	Kahua, Breye Therapeutics, Amara, Kuro
2026-10-02	Armadin	255.5 million dollar Series B co-led by Andreessen Horowitz and Accel at a 2.5 billion dollar valuation, as Mandiant founder Kevin Mandia's agentic attacker-swarm security platform runs live attack campaigns for Fortune 500 and government customers seven months after stealth	Foundational, Seeds Fincap, Numeral, Chamelio
2026-10-01	General Intuition	220 million dollar Series B at a 6.2 billion dollar valuation, nearly tripling in three months, as the AI foundation model startup trains action models on billions of gameplay clips from its own sister company Medal	Varda, Jeeves, Sand.ai, Arivihan
2026-09-30	Tiny Health	Oversubscribed $33M Series B led by B Capital as the at-home microbiome testing company posts 1,624% three-year revenue growth and quadruples its practitioner-facing business	Modulate, erad, Baselayer, Ande
2026-09-29	Instinct	$1B Series C led by Sequoia, Benchmark and Coatue at a $10B valuation, a roughly 4x jump in five weeks, as its text-message AI agent passes 100,000 users with 10% daily compounding growth	SiMa.ai, Quartermaster, Outmarket AI, Humanos
2026-09-28	Solcoa Industries	$75M seed ($45M equity led by Bain Capital Ventures plus $30M JPMorgan-anchored debt) to build a 500-tonne Nevada plant using a novel rare-earth metalmaking process, aimed at breaking China's 95% grip on metallization	Clastix, Prevision Medicine, Spiich, Barq
2026-09-27	Ultraviolette	$85M Series E led by Yali Capital and TDK Ventures; Bengaluru performance EV motorcycle maker plans US entry by 2027 on 4-5x revenue growth	Micro1, Kasvu Therapeutics, HIFI, Dextr AI
2026-09-26	Island	$400M Series F led by Evolution Equity Partners at a $6.4B valuation, more than doubling its 2024 valuation as the enterprise browser expands into governing AI agents	Cyera, Confido, Heidi Health, Firecrawl
2026-09-25	Ema	$77M Series B led by Creaegis, more than quadrupling its valuation as every existing backer doubled down and Wipro scales its AI Employees to 240,000+ workers	Ando, Kasvu Therapeutics, HIFI, Nuvah
2026-09-24	TEKEVER	$580M Series D led by UC Investments and Baillie Gifford; Ukraine-proven AI surveillance drone maker hits $6.4B valuation on a new 400M pound UK Army contract	Enveda Biosciences, Basecamp Research, Numeral, Brahma AI
2026-09-23	Verda	$189M oversubscribed Series B led by Emergence Capital; profitable Nordic GPU cloud crosses $1B valuation on $165M ARR	Snorkel AI, Nexstrom, MacroCycle, Demoverse
2026-09-22	BCI-Sonics	RMB 200M (~$30M) Pre-Series A led by HSG and Yunqi Capital; non-invasive ultrasound brain-computer interface racing China's invasive BCI leaders and OpenAI-backed Merge Labs	Spott, HighLife, CellPoint, Benford
2026-09-22	Amber Electric	€49M Series E led by Morgan Stanley's 1GT; automates 50%+ of Australia's home batteries, expanding VPP software into Europe via E.ON	Corridor, Paymob, Unit1 Studio, Drivn
2026-09-18	TypeSafe AI	$40M seed led by DCVC; "System One" model returns typed decisions for software, not chat — built by RLHF co-inventor Diogo Almeida	Space Epoch, Facilo, Treble Technologies, DheyaTech
2026-09-17	Exein	$270M Series C at $1.7B valuation (30x in 2 yrs); kernel-level security layer for robots, drones and autonomous machines	Anew Labs, Delos Data, CADDi, AIUC
2026-09-16	Euclyd	€200M+ Series A; Samsung-backed (investor + manufacturer) AI inference chip built to out-efficiency Nvidia, chaired by ex-ASML CEO	Profound, Flam, ENCOS, Nutshell Therapeutics
2026-09-15	Fortaegis	$50M oversubscribed Series A; quantum-safe security rooted in silicon, chaired by Quantinuum founder Ilyas Khan	Qupital, Tandem Health, Atomarine, UniqYou
2026-09-11	Positron AI	$875M Series C at $5B valuation; memory-first inference chips challenging Nvidia's HBM lock-in	The Boring Company, Mach Industries, Rogo Technologies, Swish
2026-09-10	Cognition AI	$2B+ Series E at $48B valuation; Devin autonomous coding agent nears $900M run-rate	DigitalPaani, Algomatic Dynamics, Limetax, Fundly.ai
2026-09-09	Bluecore Energy	Floating nuclear reactor barges for ports; $50M seed just 2 months after stealth launch	QNu Labs, ARC Ride, Circolife, Hope Care
2026-09-08	Pixxel	$100M Series C, India's largest spacetech round; building orbital AI data centers	Nua, Navana.ai, GalaxEye, Atoms (Kalanick)
2026-09-07	Medulance	GPS-dispatched ambulance network raises ₹24 Cr Series A-2	Comet, Mokobara, Kit (Speakeasy), XDOF

Sources

Compiled from search results: article pages were unreachable from the publishing environment on this date, so every fact here was cross-checked against at least two independent reports.