Startups in Waltham
Updated 23 Oct 2026
126
Startups
100
Rows shown
166,525
All startups
100 rows
| # | Company | City | Stage | Last round | Date | Total raised |
|---|---|---|---|---|---|---|
| 1 | Alloy Therapeutics | Waltham | Series D+ | Series E | 2026-04-15 | $168.2M |
| 2 | Kailera Therapeutics | Waltham | Series B | Series B | 2025-10-14 | $1.0B |
| 3 | Vecna Robotics | Waltham | Series D+ | Series D | 2026-09-09 | $214.0M |
| 4 | BostonGene | Waltham | Series B | Series B | 2022-04-06 | $200.0M |
| 5 | Linus Health | Waltham | Series B | Series B | 2021-07-06 | $64.9M |
| 6 | Benchmark Senior Living | Waltham | Seed | Seed | 2026-03-19 | $2.0M |
| 7 | Allure Security Technology | Waltham | Series B | Series B | 2026-03-19 | $55.0M |
| 8 | Upstream Bio | Waltham | Series B | Series B | 2023-06-08 | $408.0M |
| 9 | Affinia Therapeutics | Waltham | Series C | Series C | 2025-10-07 | $210.0M |
| 10 | Orionis Biosciences | Waltham | Series C | Series C | 2022-10-19 | $79.5M |
| 11 | ElevateBio | Waltham | Series D+ | Series D | 2023-05-24 | |
| 12 | Veo Robotics | Waltham | Series B | Series B | 2023-04-25 | $57.0M |
| 13 | Fortitude Biomedicines | Waltham | Seed | Seed | 2026-01-26 | $13.0M |
| 14 | Palleon Pharmaceuticals | Waltham | Series B | Series B | 2020-09-17 | $147.6M |
| 15 | Scipher Medicine | Waltham | Series D+ | Series D | 2022-02-24 | $227.0M |
| 16 | Arrakis Therapeutics | Waltham | Series B | Series B | 2019-04-18 | $113.0M |
| 17 | Eleanor Health | Waltham | Series D+ | Series D | 2024-02-23 | $215.8M |
| 18 | Humatics | Waltham | Series B | Series B | 2023-06-29 | $80.2M |
| 19 | Nobl9 | Waltham | Series C | Series C | 2023-01-31 | $44.3M |
| 20 | Altido Therapeutics | Waltham | Seed | Seed | 2026-01-28 | $12.5M |
| 21 | Uptycs | Waltham | Series C | Series C | 2021-05-26 | $93.0M |
| 22 | Ottometric | Waltham | Series A | Series A | 2025-04-09 | $15.2M |
| 23 | Monaire | Waltham | Seed | Seed | 2024-03-20 | $7.6M |
| 24 | 6 River Systems | Waltham | Series B | Series B | 2018-01-09 | $46.0M |
| 25 | Mythic Therapeutics | Waltham | Series B | Series B | 2021-12-15 | $126.6M |
| 26 | SeQure Dx | Waltham | Series A | Series A | 2021-04-02 | $17.5M |
| 27 | Avilar Therapeutics | Waltham | Seed | Seed | 2023-02-16 | $75.0M |
| 28 | Spectrawave | Waltham | Series B | Series B | 2024-09-11 | $79.6M |
| 29 | Phenomic AI | Waltham | Seed | Seed | 2020-10-07 | $11.4M |
| 30 | Imel Biotherapeutics | Waltham | Series A | Series A | 2021-11-15 | $15.0M |
| 31 | Farmblox | Waltham | Pre-seed | Pre-seed | 2024-07-23 | $2.7M |
| 32 | Bonito Biosciences | Waltham | Seed | Seed | 2024-05-31 | $9.0M |
| 33 | Instylla | Waltham | Series C | Series C | 2025-10-17 | $85.2M |
| 34 | Basecamp Bio | Waltham | Seed | Angel | 2021-03-23 | $14.0M |
| 35 | Third Pole | Waltham | Series B | Series B | 2022-12-14 | $85.8M |
| 36 | TrapX Security | Waltham | Series C | Series C | 2019-07-01 | $47.7M |
| 37 | Blue Oak Pharmaceuticals | Waltham | Series A | Series A | 2021-02-01 | $10.8M |
| 38 | X-Biotix Therapeutics | Waltham | Series A | Series A | 2018-04-24 | |
| 39 | JSonar | Waltham | Series A | Series A | 2020-06-09 | $50.0M |
| 40 | Perch Insights | Waltham | Seed | Seed | 2022-09-26 | $2.9M |
| 41 | Regenacy Pharmaceuticals | Waltham | Series B | Series B | 2022-08-15 | $17.1M |
| 42 | Randori | Waltham | Series A | Series A | 2020-04-23 | $29.8M |
| 43 | OrthoFundamentals | Waltham | Seed | Seed | 2023-01-12 | $1.3M |
| 44 | Machine Cover | Waltham | Series A | Series A | 2020-01-01 | |
| 45 | RevenueBase | Waltham | Seed | Seed | 2022-04-06 | $6.0M |
| 46 | Popup School | Waltham | Seed | Seed | 2022-04-08 | $310K |
| 47 | Avedro | Waltham | Series D+ | Series F | 2018-05-02 | $231.0M |
| 48 | Ankota | Waltham | Seed | Seed | 2016-10-12 | $625K |
| 49 | The Sursy | Waltham | Seed | Seed | 2022-06-17 | $125K |
| 50 | Paradigm4, inc. | Waltham | Series A | Series A | 2015-11-30 | |
| 51 | Freedom Center of Troy | Waltham | Seed | Seed | 2018-11-21 | $865K |
| 52 | Damora Therapeutics | Waltham | Seed | Seed | 2026-02-01 | |
| 53 | OfferLogic (Acquired by Rokt) | Waltham | Seed | Seed | 2015-07-24 | |
| 54 | General Biological | Waltham | Seed | Seed | 2025-01-01 | |
| 55 | Quattro Wireless | Waltham | Series C | Series C | 2009-03-17 | $28.3M |
| 56 | MindEdge | Waltham | Seed | Seed | 1998-01-01 | $200K |
| 57 | Guardium | Waltham | Series D+ | Series D | 2006-05-17 | $20.8M |
| 58 | NetProspex | Waltham | Series C | Series C | 2014-04-08 | $27.5M |
| 59 | Harvest Power | Waltham | Series D+ | Series E | 2015-11-23 | $244.9M |
| 60 | Brainshark | Waltham | Series C | Series C | 2005-06-13 | $20.9M |
| 61 | Beacon Dental Partners | Waltham | Series A | Series A | 2019-09-24 | |
| 62 | CircleLending | Waltham | Series B | Series B | 2006-08-22 | |
| 63 | Guardent | Waltham | Series C | Series C | 2001-08-28 | $45.0M |
| 64 | On-Q-ity | Waltham | Series B | Series B | 2012-02-28 | $31.0M |
| 65 | Aveksa | Waltham | Series D+ | Series D | 2013-03-01 | $31.0M |
| 66 | Retica Systems | Waltham | Series B | Series B | 2007-07-10 | |
| 67 | OpenPages | Waltham | Series C | Series C | 2004-03-02 | $50.0M |
| 68 | Liquid Machines | Waltham | Series D+ | Series D | 2008-02-04 | $27.1M |
| 69 | Peopleclick Authoria | Waltham | Series D+ | Series E | 2007-09-28 | $126.5M |
| 70 | Adnexus | Waltham | Series C | Series C | 2007-08-07 | $55.5M |
| 71 | Eastern Standard Provisions | Waltham | Series B | Series B | 2022-12-20 | |
| 72 | Logical Therapeutics | Waltham | Series C | Series C | 2010-05-27 | $79.4M |
| 73 | Intelligent Machines Lab | Waltham | Seed | Seed | 2020-01-01 | |
| 74 | Archivas | Waltham | Series C | Series C | 2006-02-27 | $28.0M |
| 75 | Incipient | Waltham | Series D+ | Series E | 2008-02-20 | $92.1M |
| 76 | Sentrix | Waltham | Series B | Series B | 2014-09-17 | $10.0M |
| 77 | Tocobox Inc. | Waltham | Seed | Seed | 2014-01-01 | |
| 78 | Unlock Real Estate | Waltham | Seed | Seed | 2021-09-20 | |
| 79 | Oco | Waltham | Series D+ | Series D | 2008-12-29 | $15.9M |
| 80 | Arsia Therapeutics | Waltham | Seed | Seed | 2015-01-01 | |
| 81 | Colubris Networks | Waltham | Series D+ | Series E | 2006-11-03 | $53.0M |
| 82 | IMlogic | Waltham | Series C | Series C | 2004-05-18 | $33.8M |
| 83 | OnHand | Waltham | Seed | Seed | 2014-06-23 | $500K |
| 84 | Telegea | Waltham | Series C | Series C | 2000-07-11 | $42.0M |
| 85 | auctionPAL | Waltham | Series A | Series A | 2007-03-01 | $2.4M |
| 86 | Gordon's Wine | Waltham | Seed | Seed | 2014-02-14 | $602K |
| 87 | Syntonix Pharmaceuticals | Waltham | Series B | Series B | 2002-02-01 | $35.8M |
| 88 | Confluent Surgical | Waltham | Series D+ | Series D | 2005-03-31 | |
| 89 | Jarg Corporation | Waltham | Series A | Series A | 2000-03-03 | |
| 90 | MedVentive | Waltham | Series D+ | Series D | 2011-10-21 | $31.9M |
| 91 | CXO Systems | Waltham | Series A | Series A | 2003-03-03 | $4.8M |
| 92 | Oblicore | Waltham | Series C | Series C | 2004-03-25 | $20.0M |
| 93 | SDL Enterprise Technologies | Waltham | Series D+ | Series E | 2007-09-28 | $57.1M |
| 94 | Quantia | Waltham | Series B | Series B | 2013-09-03 | $34.0M |
| 95 | Q1 Labs | Waltham | Series D+ | Series D | 2007-01-01 | $37.7M |
| 96 | Kwicr | Waltham | Series A | Series A | 2013-10-29 | $8.1M |
| 97 | iConverse | Waltham | Series C | Series C | 2002-09-09 | $6.0M |
| 98 | Magen BioSciences | Waltham | Series A | Series A | 2008-01-16 | |
| 99 | Baton Rouge Vascular Access | Waltham | Series A | Series A | 2011-11-16 | $10.9M |
| 100 | CloudFloor | Waltham | Series A | Series A | 2011-03-21 | $3.0M |
Table 1. Startups in Waltham, by total raised. Source: FundingWatcher. Data as of 23 October 2026. Base: 126.
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Funding stages
Other cities
Cite: FundingWatcher, 126 startups, 23 October 2026. https://fundingwatcher.com/startups/in/waltham-massachusetts/