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Honolulu Startups to Watch in 2027: 5 Verified Companies, Where They Get Funding and Lessons for Founders

Honolulu Startups to Watch in 2027: Verified Companies in Defense Software, Energy Storage, Flood Tech and AI

Honolulu is best known for tourism, but it is also home to the US military's Indo-Pacific headquarters, the University of Hawaiʻi at Mānoa and an island power grid that runs on expensive imported fuel. Those three facts explain most of the startups worth watching here: software for military planners, energy storage for an island grid, ocean and flood sensors from university labs, and AI tools built by experienced founders who chose to stay. The 2026 version of this article listed ten Honolulu startups, but when we checked them, we could not find a company website or any news report for nine of them, and the tenth is based in San Diego. For this 2027 edition we started again: in October 2026 we checked each company on its own website, that it still operates, what ties it to Honolulu, what it sells and what it publishes about its funding. The old names and why they are gone are listed near the end.
Quick answer: the Honolulu startups to watch in 2027 are Onebrief (planning software for military commands), Blue Planet Energy (sodium-ion and supercapacitor energy storage), Holu Hou Energy (solar and batteries that apartments and homes share), Hohonu (low-cost flood and water level sensors) and Olelo Intelligence (AI call scoring for auto repair shops). Onebrief closed a $200 million Series D in January 2026 and won the Deal of the Year at the 2026 Hawaii Entrepreneur Awards. For newer names, watch Blue Startups' Cohort 18, and for funding, start with Blue Startups, Hawaiʻi Angels and the state's HTDC.
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Why Honolulu Matters for Founders in 2027

Honolulu's startup scene is small, so it grows around a few strong local customers and problems. The first is defence: the US Indo-Pacific Command is on Oʻahu, and Onebrief, which sells planning software to military staffs, issues its press releases from Honolulu. The second is energy: Hawaiʻi generated most of its electricity from imported oil, and in 2015 it became the first US state to set a 100% renewable electricity target, for 2045, as Blue Planet Energy's company history explains. That makes the islands a test bed for storage and shared solar. The third is the ocean: University of Hawaiʻi research turns into companies such as Hohonu, whose first water level sensor was built for a Hawaiian fishpond.
Being in the middle of the Pacific also shapes how founders sell. Most Honolulu startups on this list sell far beyond Hawaiʻi: Hohonu to US counties from Texas to Massachusetts, Olelo to auto repair franchises on the mainland, Onebrief to commands around the world. For the wider picture, compare our guides to the best startup cities in North America and the city lists for San Diego and Hong Kong, the other end of Hawaiʻi's East Meets West bridge.

Honolulu Startups to Watch in 2027 Compared

StartupWhat it doesCustomersLatest funding we citeHonolulu link checked
OnebriefPlanning, wargaming and AI software for military commandsUS military and allies$200M Series D, January 2026 (company)Press releases datelined Honolulu
Blue Planet EnergyHybrid sodium-ion and supercapacitor energy storageCommercial, telecom and off-grid sitesNot publishedYes, headquarters, 55 Merchant Street
Holu Hou EnergySolar and batteries shared between homes and unitsApartment and home owners, military housingNot publishedYes, Hawaii office in Aiea, Oʻahu
HohonuWater level sensors and flood softwareCounties, cities and researchersGrants from NSF and Schmidt Marine (no amounts)Spin-out of UH Mānoa, "Built in Hawaiʻi"
Olelo IntelligenceAI that scores calls and ties them to invoicesMulti-unit auto repair groups$1M angel round, January 2026 (company)Calls itself a Honolulu company
Sources: each company's official website or news page, checked 30 October 2026; awards from the Hawaii Venture Capital Association. Amounts are in US dollars.

The Honolulu Startups to Watch in 2027

1. Onebrief: planning software for military commands

Onebrief builds what it calls a command decision platform: software in which military staffs plan operations together, run wargames and simulations, and use AI agents for routine staff work. It says the platform runs on classified networks including SIPR and JWICS. On 23 January 2026 it announced a $200 million Series D, combining new and existing shares, at a post-money valuation of more than $2 billion. Battery Ventures and Sapphire Ventures led the round, Salesforce Ventures joined, and General Catalyst and Insight Partners invested again; with the money Onebrief bought Battle Road Digital, a company that applies game technology to defence simulation. In July 2026 it said its AtomEngine wargaming platform had received Impact Level 5, Impact Level 6 and Top Secret authorizations. Its press releases carry a Honolulu dateline, and its CEO Grant Demaree received the Deal of the Year at the 2026 Hawaii Entrepreneur Awards.
Lesson for founders: Onebrief built for a customer that sits on its doorstep. Being close to the people who use your product every day, and getting their security approvals early, can matter more than being in Silicon Valley.
Best for: founders in defence, government software and simulation who want to see how a startup sells to the military.

2. Blue Planet Energy: batteries for sharp peaks in demand

Blue Planet Energy has its headquarters at 55 Merchant Street in downtown Honolulu. Its current product combines sodium-ion batteries and supercapacitors in one system, with its own control software: the supercapacitors cover short spikes within seconds and the batteries cover longer peaks, so a site can stay under its grid limit. It targets busy commercial sites, telecom and network sites, and sites that run on solar, wind or generators. The company was founded in Honolulu by Henk Rogers, the entrepreneur who secured the handheld and console rights to Tetris; it first brought Blue Ion lithium iron phosphate (LFP) storage to the US market for homes and businesses, and it still supports those systems. It does not publish funding figures, so we cite none.
Lesson for founders: Blue Planet Energy changed its product as the market changed, from home batteries to storage for peak demand at commercial and telecom sites, and kept supporting its earlier customers while it did. A pivot does not have to mean abandoning your installed base.
Best for: founders in energy storage, hardware and climate tech, and anyone selling to sites with expensive or limited grid connections.
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3. Holu Hou Energy: solar power that neighbours share

Holu Hou Energy sells solar and battery systems that can share energy between several homes or apartments, which it calls its EnergyCluster architecture and EnergyShare technology. Its Hawaii sales office is at 99-1026 Iwaena Street in Aiea, on Oʻahu, with mainland sales in California and engineering in Wisconsin. With Centinel, it is fitting 1,400 US military homes at Aliamanu Military Reservation, part of the Army's Island Palm Communities, with 15 MW of solar and 25 MWh of storage, so all of them keep power during an outage. The company says that when those communities had outages of up to nearly nineteen hours between February and May 2026, its systems kept critical household functions running and recovered quickly once the grid came back. Its leaders Ted Peck and Brad Hansen were named Island Innovators of the Year at the 2026 Hawaii Entrepreneur Awards. It does not publish its funding.
Lesson for founders: Holu Hou found the customer that cares most about the problem it solves: military housing, where a power cut is a safety and readiness issue. One large, demanding customer can prove a product faster than hundreds of small ones.
Best for: founders in solar, housing and grid resilience, and anyone selling to landlords or military housing.

4. Hohonu: flood sensors born in a Hawaiian fishpond

Hohonu sells low-cost water level sensors and software that show flooding in real time, warn teams when water reaches a set level and keep a record for funding applications. According to its company story, it grew out of Dr. Brian Glazer's oceanography lab at the University of Hawaiʻi at Mānoa: in 2014 he built a sensor for a community restoring an 800-year-old Hawaiian fishpond, then developed the product with engineer Stanley Lio. Funding from the National Science Foundation and Schmidt Marine Technology Partners took it from lab to product; Hohonu was incorporated in 2019 and its first paid deployment, in 2021, covered 54 communities in the Southeast US. It now lists more than 200 sensor locations in 3 countries and 18 US states, won a Texas state contract for flood early warning in July 2026, and was one of ten winners of a water resilience challenge run by UpLink and the World Economic Forum. Its site says "Built in Hawaiʻi" but gives no street address.
Lesson for founders: Hohonu started with one real local problem and grant money, then found that thousands of communities had the same problem. Public grants can carry a hardware company to its first paying customers.
Best for: founders in climate adaptation, sensors and government technology, and researchers who want to turn lab work into a company.
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5. Olelo Intelligence: AI for the auto repair counter

Olelo Intelligence calls itself a Honolulu company building a revenue operating system for groups of auto repair shops. It scores every phone call a shop takes, links won jobs to the finalized invoice in the shop's own system, and shows owners which shops and staff need attention; it also sells coaching tools and an AI assistant that answers calls staff cannot take. It names Turbo Tint, Mister Transmission, Milex, Velocity Auto Care, RMS Auto, Lex Brodie's and Relay Hill among the franchises and groups using it. Its investor page says Hawaiʻi Angels led its $1 million angel round in January 2026 and put in $500,000, and that it is a Blue Startups portfolio company. Co-founder and CEO Miki Hardisty, a former global corporate CTO at Jack in the Box, was named Tech Entrepreneur of the Year at the 2026 Hawaii Entrepreneur Awards, and Olelo won the Hawaii regional round of the Startup World Cup in April 2026. Its mailing address is in San Francisco.
Lesson for founders: Olelo counts a result only when an invoice proves it. If you sell AI to small business owners, show them money they can check in their own system, not a dashboard of activity.
Best for: founders building AI for local service businesses, and women founders looking for a Honolulu role model who raised from local angels.

Newer Names to Follow: Blue Startups Cohort 18

Blue Startups' Cohort 18 spent eight weeks in Honolulu from July 2026 and pitched at its Honolulu Demo Day at the Entrepreneurs Sandbox in September. Its portfolio companies include NatureMe (an AI nature guide for stress and loneliness), Nice Industries, Trajectory Media (AI forecasts of video game sales), Travel Nanny, Paws Abroad (international pet travel), CivicNexus (an AI platform for government affairs teams) and Pacific Hybreed (hybrid oyster and clam seed). Its advisory companies include Lu'uLive (live ocean conditions and video for divers) and LaunchDetect, which Blue Startups describes as a geospatial startup based in Hawaiʻi. Not every cohort company is based in Honolulu: Pacific Hybreed, for example, is on the Big Island and announced a $1 million round with Hawaiʻi Angels and Blue Startups in May 2026. These are early companies, so check each one's own site before you rely on it.

Where Honolulu Startups Get Support

  • Blue Startups: the accelerator founded in 2012 by Henk Rogers, Maya Rogers and Chenoa Farnsworth, with its headquarters in downtown Honolulu. It runs a 12-week, mentor-led programme with up to $250,000 in investment, eight weeks of it in Honolulu and a final week in San Francisco, and organises East Meets West, which it calls Hawaiʻi's largest tech conference. It says 60% of the 12 Cohort 17 startups were founded or led by women.
  • Hawaiʻi Angels: a Honolulu angel network investing since 2002. It hears two startup pitches a month, says it and its partners have invested more than $75 million, and led Olelo Intelligence's round.
  • Hawaiʻi Technology Development Corporation (HTDC): the state agency for tech companies. Its HSBIR grants match up to 50% of a federal SBIR or STTR Phase I award, up to $75,000; FY27 applications open 23 October 2026 and close 11 December 2026. It co-manages HI-CAP, $62 million in federal funding secured in 2022 to help small businesses reach capital, deployed until 2030, runs the Entrepreneurs Sandbox in Honolulu, and holds the 2026 Hawaii SBIR Conference on 4 November 2026 at the Blaisdell Center.
  • Elemental Impact: the climate tech investor formerly called Elemental Excelerator, a non-profit with offices in Honolulu, New York, Washington DC and San Francisco. It invests in energy, industry, food and agriculture, nature, water and transport, and accepts applications on a rolling basis.
  • Mana Up: a six-month accelerator for Hawaiʻi-based consumer product companies, founded in 2018 by Meli James and Brittany Heyd; it was taking applications for Cohort 12.
  • XLR8UH: the University of Hawaiʻi accelerator run with Sultan Ventures, for companies built on university research.

Honolulu Companies From the Old List That Changed or Could Not Be Verified

The 2026 version of this article listed ten companies, with claims about AI, blockchain and robotics that we could not confirm. Here is what we found:
  • Not found: Holomua Technologies, WaveRider Ventures, Hana Robotics, Kalo Innovations, Akamai Labs, LeiNode AI, Hoʻokele Ventures, AlohaEd AI and Mana Mobility. We found no company website or news report for any of them, so we removed them.
  • Blue Ocean Barns: a real company that grows seaweed for Brominata, a feed additive that it says cuts methane from cattle by up to 80%. Its site gives its headquarters as San Diego, California, so it is not a Honolulu startup.
  • Kuehnle AgroSystems: startup directories still list this algae company in Honolulu, but its contact page now gives Emeryville, California and Swanage, UK.
  • Hawaii Strategic Development Corporation: the state's old venture investment agency was repealed with effect from 1 July 2019; its site sends enquiries to HTDC.
  • Elemental Excelerator: now Elemental Impact; the old web address redirects to the new name.
We also removed the old article's unsourced "15% projected growth" figure for Honolulu's tech sector and its links to third-party lists.

Which Honolulu Startup Should You Learn From?

  • You sell to government or defence: study Onebrief and how it earned security approvals before it scaled.
  • You build hardware for energy: study Blue Planet Energy and how it changed products while supporting its installed base.
  • You want one big customer to prove your product: study Holu Hou Energy and its military housing project.
  • You are a researcher with a product idea: study Hohonu, which went from a university lab and grants to paying counties.
  • You build AI for small businesses: study Olelo Intelligence and its invoice-based proof of results.
  • You are just starting: apply to Blue Startups or Mana Up, and pitch Hawaiʻi Angels once you have traction.
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How Founders Use Honolulu's Startup Scene

Notice where the money comes from: local angels backed Olelo and Pacific Hybreed, federal research grants carried Hohonu, and Onebrief raised from large US venture funds once it had military customers. If you build technology in Hawaiʻi, combine all three. Compare local investors with those in our guides to angel investors in North America, deep tech VCs in North America and VCs for AI startups, and look at programmes beyond Blue Startups in our list of accelerators for AI startups. Non-dilutive money helps too: see our lists of grants for early-stage startups and grants for female entrepreneurs, and our guide to venture capital for female founders.
Pitch practice pays off here: Olelo won the Startup World Cup regional round at East Meets West. Find more stages in our list of startup competitions in North America and the best pitch competitions, and meet investors at the startup events in San Francisco and in Tokyo, two cities on Blue Startups' own map (its cohorts finish in San Francisco, and it has taken its programme to Tokyo), or at the top climate tech events. Comparing cities? See our lists of Chicago startups to watch, Baltimore startups to watch, Providence startups to watch and Rotterdam startups to watch.
Before you copy any of these business models, validate your startup idea with real customers. An island market is small, so many Honolulu startups need customers on the mainland or in Asia early, and that means being easy to find online: list your startup in the F/MS marketing directories, publish your startup press release, and write about your product with the F/MS AI SEO Tool or the AI SEO Blog so customers, investors and AI assistants can find you.

FAQ About Honolulu Startups to Watch in 2027

Which Honolulu startups should I watch in 2027?

Our verified list: Onebrief, Blue Planet Energy, Holu Hou Energy, Hohonu and Olelo Intelligence. Each still operates and shows a tie to Honolulu on its official site, checked in October 2026. For newer companies, follow Blue Startups' Cohort 18.

Which Honolulu startup raised the most money recently?

Onebrief, which announced a $200 million Series D on 23 January 2026 at a post-money valuation of more than $2 billion, led by Battery Ventures and Sapphire Ventures. It won Deal of the Year at the 2026 Hawaii Entrepreneur Awards.

Are there climate tech startups in Honolulu?

Yes. Blue Planet Energy builds sodium-ion and supercapacitor storage, Holu Hou Energy shares solar and battery power between homes, and Hohonu sells flood sensors. Elemental Impact, a climate tech investor with an office in Honolulu, also backs companies in this field.

Is there a Honolulu startup founded by a woman on this list?

Olelo Intelligence was co-founded by CEO Miki Hardisty, who was named Tech Entrepreneur of the Year at the 2026 Hawaii Entrepreneur Awards. Blue Startups says 60% of its Cohort 17 startups were founded or led by women, and Mana Up was founded by Meli James and Brittany Heyd.

What is the best accelerator in Honolulu?

Blue Startups is the best known: a 12-week, mentor-led programme with up to $250,000 in investment, founded in 2012. Mana Up suits consumer product brands, and XLR8UH suits companies built on University of Hawaiʻi research.

Where can Honolulu startups find angel investors?

Hawaiʻi Angels, which has invested since 2002 and hears two startup pitches a month. In 2026 it led Olelo Intelligence's $1 million round and took part in Pacific Hybreed's $1 million round.

Does Hawaii give grants to startups?

Yes. HTDC's HSBIR programme matches up to 50% of a federal SBIR or STTR Phase I award, up to $75,000. FY27 applications run from 23 October to 11 December 2026.

What happened to the startups on the old list?

We found no company website or news report for nine of them, including Holomua Technologies, LeiNode AI and AlohaEd AI, so we removed them. Blue Ocean Barns is real but gives San Diego as its headquarters.

What can founders learn from Honolulu startups?

Build for a customer you can reach in person, sell beyond the islands early, use public grants to reach your first paying customers, and prove results in numbers your customer can check.

Where can I get a backlink by writing about my startup?

You can publish a guest post in one of the Fe/male Switch startup blogs, which rank in Google and in AI tools. Get a quality backlink.

About the Author

Violetta Bonenkamp, also known as MeanCEO, is an experienced startup founder with an impressive educational background including an MBA and four other higher education degrees. She has over 20 years of work experience across multiple countries, including 5 years as a solopreneur and serial entrepreneur. Throughout her startup experience she has applied for multiple startup grants at the EU level, in the Netherlands and Malta, and her startups received quite a few of those. She’s been living, studying and working in many countries around the globe and her extensive multicultural experience has influenced her immensely.
2026-10-30 01:56 Best Startups