| Website | sigmapartners.com |
| Phone | (650)853-1700 |
| Employees | |
| Founded | 1984 |
| Eighth Fund, 9/07 | $500M |
Sigma Partners is a venture capital firm, founded in 1984, that has invested in over a hundred early stage companies and has over $2 billion under management.
In 2007, it raised $500 million for its most recent fund, named Sigma Partners 8.
| Company | Date | Round | Size | Participants |
| Silverlink Communications | 1/12 | Series D | $2M | 2 |
| MOGL | 1/12 | Series B | $10M | 3 |
| Azuki Systems | 1/12 | Unattributed | $5.1M | 2 |
| Casenet | 1/12 | Unattributed | $3M | 2 |
| GainSpan | 12/11 | Series C | $18M | 7 |
| Enkata Technologies | 10/11 | Series C | $4.4M | 3 |
| Zetta | 9/11 | Series C | $9M | 2 |
| Centrify | 8/11 | Series D | $16M | 5 |
| High Street Partners | 8/11 | Series C | $6.3M | 3 |
| Leyden Energy | 8/11 | Series B | $20M | 4 |
| Strava | 7/11 | Series B | $12.6M | 2 |
| Interactions Corporation | 7/11 | Unattributed | $12M | 4 |
| Acquia | 7/11 | Series D | $15M | 3 |
| JouleX | 6/11 | Unattributed | $17M | 5 |
| Intacct | 6/11 | Unattributed | $12.3M | 5 |
| Demandbase | 5/11 | Unattributed | $10M | 4 |
| Mobiquity | 3/11 | Series A | $5M | 2 |
| Recyclebank | 2/11 | Series C | $14M | 7 |
| Doxo | 2/11 | Series B | $10M | 3 |
| Damballa | 2/11 | Unattributed | $12M | 7 |
| Strava | 1/11 | Series A | $3.5M | 1 |
| Rave Wireless | 12/10 | Unattributed | $4M | 3 |
| Nasuni | 12/10 | Series B | $15M | 3 |
| Soladigm | 12/10 | Series C | $30M | 5 |
| DocuSign | 12/10 | Unattributed | $27M | 5 |
| Azuki Systems | 12/10 | Unattributed | $4M | 2 |
| Heartland Robotics | 11/10 | Series B | $20M | 4 |
| Zetta | 11/10 | Series B | $11.5M | 2 |
| Acquia | 11/10 | Series C | $8.5M | 3 |
| AutoVirt | 10/10 | Unattributed | $3.8M | 2 |
| CallMiner | 10/10 | Unattributed | $7M | 3 |
| PVT Solar | 9/10 | Series B | $13.7M | 2 |
| Quantenna Communications | 9/10 | Series E | $21M | 5 |
| VoltDB | 9/10 | Unattributed | $5M | 2 |
| CallMiner | 9/10 | Series C | $4M | 3 |
| YouSendIt | 8/10 | Series D | $15M | 4 |
| Attributor | 6/10 | Series D | $3.2M | 3 |
| expressor software | 5/10 | Unattributed | $5.55M | 3 |
| WordStream | 5/10 | Series B | $6M | 2 |
| Voxify | 4/10 | Unattributed | $8M | 4 |
| Casenet | 4/10 | Debt | $3.5M | 2 |
| Quantenna Communications | 2/10 | Series D | $15M | 7 |
| Nasuni | 12/09 | Series A | $8M | 2 |
| ExaGrid Systems | 12/09 | Series A | $16M | 4 |
| Solaria | 12/09 | Debt | $7M | 7 |
| AutoVirt | 11/09 | Unattributed | $5M | 2 |
| Nimblefish Technologies | 11/09 | Debt | $950k | 3 |
| Recyclebank | 11/09 | Unattributed | $28M | 4 |
| Nexx Systems | 10/09 | Series D | $4M | 2 |
| Soladigm | 10/09 | Unattributed | $20.7M | 2 |
| Blackwave | 9/09 | Series C | $7M | 3 |
| TradeBeam | 9/09 | Unattributed | $7M | 6 |
| Oversight Systems | 9/09 | Unattributed | $14.5M | 4 |
| Acquia | 7/09 | Series B | $8M | 2 |
| DocuSign | 5/09 | Series D | $5M | 4 |
| Azuki Systems | 5/09 | Series B | $6M | 2 |
| Virtual Goods Market | 4/09 | Unattributed | $5M | 2 |
| Quantenna Communications | 4/09 | Series C | $14M | 5 |
| Viximo | 4/09 | Series A | $5M | 2 |
| R2 Semiconductor | 2/09 | Series A | $2M | 2 |
| WordStream | 1/09 | Series A | $4M | 1 |
| SugarSync | 1/09 | Series B | $10M | 3 |
| ExaGrid Systems | 12/08 | Series D | $12M | 3 |
| AutoVirt | 11/08 | Series B | $4M | 2 |
| Rave Wireless | 11/08 | Series D | $7M | 3 |
| Dexterra | 10/08 | Unattributed | $21.5M | 6 |
| Applied Identity | 10/08 | Series C | $10M | 5 |
| Zetta | 9/08 | Series A | $10.7M | 2 |
| expressor software | 8/08 | Series B | $10M | 3 |
| Demandbase | 8/08 | Unattributed | $8M | 3 |
| Replay Solutions | 8/08 | Series B | $11M | 2 |
| ScanCafe | 8/08 | Series B | $4M | 1 |
| YouSendIt | 7/08 | Series C | $14M | 5 |
| Vericept | 7/08 | Unattributed | $8M | 1 |
| OpenSpan | 7/08 | Series C | $13M | 5 |
| iWatt | 7/08 | Series E | $12.4M | 3 |
| Oversight Systems | 7/08 | Series B | $10.2M | 3 |
| Initiate Systems | 6/08 | Unattributed | $26M | 7 |
| oDesk | 6/08 | Series C | $15M | 4 |
| CrownPeak | 6/08 | Series B | $6M | 3 |
| Hanger Network In-Home Media | 6/08 | Series B | $10M | 3 |
| MarketLive | 5/08 | Series E | $20M | 5 |
| Intacct | 4/08 | Unattributed | $15M | 3 |
| EverSpin Technologies | 4/08 | Series A | $20M | 5 |
| Vlingo | 4/08 | Series B | $20M | 3 |
| Attributor | 4/08 | Series C | $12M | 2 |
| Recyclebank | 3/08 | Series B | $30M | 4 |
| Incipient | 2/08 | Series E | $15.6M | 8 |
| Voxify | 2/08 | Series D | $15M | 4 |
| Enkata Technologies | 2/08 | Unattributed | $8M | 2 |
| CiRBA | 1/08 | Series B | $12M | 1 |
| Tervela | 1/08 | Series C | $20M | 1 |
| HiWired | 1/08 | Unattributed | $5M | 2 |
| Entellium | 1/08 | Unattributed | $50M | 2 |
| AutoVirt | 1/08 | Series A | $4.5M | 2 |
| Jellyvision | 1/08 | Series B | $5M | 1 |
| GainSpan | 12/07 | Series B | $20M | 6 |
| Acquia | 12/07 | Series A | $7M | 3 |
| Centice | 11/07 | Series B | $11.3M | 2 |
| ExaGrid Systems | 11/07 | Series C | $20M | 3 |
| Quantenna Communications | 11/07 | Series B | $12.7M | 4 |
| Blackwave | 10/07 | Series B | $16M | 3 |
| Rave Wireless | 9/07 | Series C | $18M | 3 |
| CRI Technologies | 9/07 | Series A | $10M | 2 |
| Azuki Systems | 9/07 | Series A | $6M | 2 |
| DocuSign | 9/07 | Series C | $12.4M | 4 |
| TradeBeam | 8/07 | Series C | $29M | 6 |
| Certeon | 7/07 | Series B | $15M | 4 |
| expressor software | 7/07 | Unattributed | $7.5M | 2 |
| Mobius Power | 6/07 | Seed | $4.5M | 3 |
| Intacct | 6/07 | Unattributed | $14M | 3 |
| Recyclebank | 5/07 | Series A | $13.1M | 2 |
| GlassHouse Technologies | 5/07 | Series E | $11.5M | 6 |
| YouSendIt | 4/07 | Series B | $10M | 4 |
| Centrify | 4/07 | Series C | $15M | 4 |
| Digital Fuel Technologies | 3/07 | Series E | $5M | 5 |
| Digital Fuel | 3/07 | Series E | $5M | 4 |
| Dexterra | 2/07 | Unattributed | $36M | 6 |
| Dexterra | 2/07 | Series E | $36M | 6 |
| Hanger Network In-Home Media | 2/07 | Series A | $8M | 2 |
| AutoVirt | 1/07 | Seed | $500k | 2 |
| Attributor | 12/06 | Series B | $8M | 5 |
| OpenSpan | 12/06 | Series A | $8M | 3 |
| Vlingo | 12/06 | Series A | $6.5M | 2 |
| Enkata Technologies | 9/06 | Series D | $4.88M | 3 |
| oDesk | 9/06 | Series B | $8M | 3 |
| GainSpan | 9/06 | Series A | $13.4M | 4 |
| Damballa | 8/06 | Series A | $2.5M | 3 |
| CallMiner | 7/06 | Series B | $10M | 4 |
| Topio | 6/06 | Series D | $8M | 3 |
| WebGen Systems | 6/06 | Unattributed | $9.5M | 2 |
| Encover | 5/06 | Series C | $8M | 3 |
| Applied Identity | 5/06 | Series B | $12M | 4 |
| Kace networks | 5/06 | Series B | $8M | 2 |
| oDesk | 4/06 | Series A | $6M | 2 |
| Rave Wireless | 4/06 | Series B | $12M | 3 |
| Vormetric | 4/06 | Series D | $5M | 4 |
| DocuSign | 4/06 | Series B | $10M | 3 |
| SugarSync | 3/06 | Series B | $13.5M | 3 |
| Kirusa | 3/06 | Series B | $11M | 3 |
| Dexterra | 2/06 | Series D | $18M | 5 |
| Incipient | 1/06 | Series D | $24M | 7 |
| Incipient | 1/06 | Series D | $24M | 7 |
| Attributor | 1/06 | Series A | $2M | 5 |
| Envis | 1/06 | Series A | $6M | 1 |
| Fortify Software | 12/05 | Series D | $10M | 2 |
| Sequence Design | 12/05 | Unattributed | $5.3M | 7 |
| Nexx Systems | 9/05 | Series C | $10M | 1 |
| Vendavo | 9/05 | Series E | $15M | 5 |
| Rave Wireless | 8/05 | Series A | $5M | 2 |
| Dexterra | 8/05 | Series C | $11M | 5 |
| Kace networks | 7/05 | Unattributed | $3M | 1 |
| Topio | 4/05 | Series C | $8M | 3 |
| SDL Enterprise Technologies | 4/05 | Series E | $6M | 4 |
| Nimblefish Technologies | 4/05 | Unattributed | $12M | 3 |
| ExaGrid Systems | 3/05 | Series B | $13.5M | 2 |
| aPriori Technologies | 3/05 | Series A | $4.5M | 2 |
| Vericept | 2/05 | Unattributed | $12.5M | 4 |
| Voxify | 2/05 | Series B | $10M | 3 |
| Sychron Advanced Technologies | 1/05 | Series B | $5M | 1 |
| Incipient | 1/05 | Series C | $20.1M | 5 |
| Applied Identity | 1/05 | Series A | $11M | 3 |
| Digital Fuel Technologies | 1/05 | Series D | $20M | 4 |
| Aprimo | 1/05 | Unattributed | $14.5M | 4 |
| Silverlink Communications | 5/04 | Series B | $5.6M | 2 |
| Responsys | 4/03 | Unattributed | $9.4M | 6 |
| Responsys | 4/01 | Unattributed | $20M | 4 |
| Zayante | 5/99 | Series B | $1.5M | 1 |
| Zayante | 10/98 | Series A | $3M | 1 |