Open source focus
Open Source Alternatives to Mailerpst
60 open source Data Migration Tools options similar to Mailerpst, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Each profile notes license and self-hosting where we have it.
- RORoku85Media & EntertainmentSan Jose, United States$6.0M
Open source
Google73InternetMountain View, United States$9.1BOpen source
Docker71SoftwareSan Francisco, USA$105.0MOpen source
- MOMongoDB70Big DataNew York, USA$1.5B
Open source
Expo70SoftwareSan Francisco, USA$45.0MOpen source
Sysdig69CybersecuritySan Francisco, USA$608.0MOpen source
XBOW69CybersecuritySeattle, United States$215.0MOpen source
WP Engine65InternetAustin, United States$251.2MOpen source
Zendesk65Customer ServiceSan Francisco, United States$500KOpen source
Oumi PBC64Artificial IntelligenceSan Francisco, USA$63.0MOpen source
Intelligent Legal Solutions62LegalTechChicago, USA$55.9MOpen source
NinjaOne62SoftwareAustin, United States$1.2BOpen source
FossID62SoftwareStockholm, Sweden$63.0MOpen source
Icometrix62HealthTechAntwerp, BelgiumOpen source
- RERelationalAI61Artificial IntelligenceBerkeley, United States$144.5M
Open source
- NGNGINX60SoftwareSan Francisco, USA$56.0M
Open source
Fair Isaac Corporation (FICO)60Financial ServicesBozeman, United StatesOpen source
Specter Ops59CybersecurityAlexandria, United States$100.0MOpen source
Axiom Quant58Artificial IntelligenceSan Francisco, United States$264.0MOpen source
- SESeldon58Artificial IntelligenceLondon, United Kingdom$63.0M
Open source
Linear57SoftwareSan Francisco, United States$134.0MOpen source
- PIPico Immersive56Virtual RealityBeijing, China$397.1M
Open source
United Manufacturing Hub Systems54ManufacturingCologne, Germany$5.4MOpen source · Self-hostable
Push Protocol54BlockchainMumbai, India$11.5MOpen source
Tensorlake54Artificial IntelligenceSan Francisco, United States$8.0MOpen source
Theori54CybersecurityAustin, United States$15.4MOpen source
- MOMozilla Firefox53InternetSan Francisco, United States$2.3M
Open source · Self-hostable
InsightFinder52Artificial IntelligenceSan Jose, USA$15.0MOpen source
- NENextcloud52Cloud ComputingNuremberg, Germany$63.0M
Open source · Self-hostable
- 64645 Ventures52Venture CapitalNew York, USA$63.0M
Open source
Domo50Business IntelligenceAmerican Fork, United States$33.0MOpen source
- AXAxiomatic AI50Artificial IntelligenceCambridge, United States$24.0M
Open source
- ZYZymtrace50Artificial IntelligenceWilmington, United States$12.2M
Open source
Respan49Artificial IntelligenceSan Francisco, United States$5.0MOpen source
Collos48Climate TechBoston, United States$1.1MOpen source
- PAParabol48SoftwareLondon, United Kingdom$63.0M
Open source
AltStore PAL47SoftwareSan Francisco, USA$6.0MOpen source
Antioch47RoboticsSan Francisco, USA$8.5MOpen source
- ARArduino46Open SourceSomerville, United States$54.0M
Open source · Self-hostable
Bonterra46SoftwareAustin, United States$63.0MOpen source
Lupin & Holmes45CybersecurityGrenoble, France$5.9MOpen source
Plumerai45On-Device AILondon, United Kingdom$11.3MOpen source
- VOVor Systems44Renewable EnergySan Francisco, USA$3.0M
Open source
Huper43Artificial IntelligenceSan Francisco, USA$1.5MOpen source
CGI42IT ServicesMontreal, Canada$3.3BOpen source
Redgate Software42SoftwareCambridge, United KingdomOpen source
Gryphon Investors41Private EquitySan Francisco, United States$63.0MOpen source
Cloud Concierge30IT SupportSan Francisco, United StatesOpen source
Marine Hound21Climate TechValletta, MaltaOpen source
VIRES Simulationstechnologie GmbH (now part of AVL)21Autonomous VehiclesAugsburg, GermanyOpen source
- RERed Hat20SoftwareRaleigh, USA
Open source · Self-hostable
- APApache HTTP Server18Open SourceWakefield, United States
Open source · Self-hostable
- MOMoltbook15Artificial IntelligenceSan Francisco, United States
Open source
Jefsolutions14AIOpen source
- EUEurostack10SoftwareEurope
Open source · Self-hostable
- EUEuro-Office10SoftwareEurope
Open source · Self-hostable
- OPOpenSearch6SoftwareSeattle, USA
Open source
- GLGLM3Artificial IntelligenceBeijing, China
Open source
- SOSoverin2SoftwareGermany
Open source · Self-hostable
- XWXWiki2SoftwareParis, France
Open source · Self-hostable
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| RORoku | Media & Entertainment | Open source | San Jose, United States | $6.0M | 85 | |
| Google | Internet | Open source | Mountain View, United States | $9.1B | 73 | |
| Docker | Software | Open source | San Francisco, USA | $105.0M | 71 | |
| MOMongoDB | Big Data | Open source | New York, USA | $1.5B | 70 | |
| Expo | Software | Open source | San Francisco, USA | $45.0M | 70 | |
| Sysdig | Cybersecurity | Open source | San Francisco, USA | $608.0M | 69 | |
| XBOW | Cybersecurity | Open source | Seattle, United States | $215.0M | 69 | |
| WP Engine | Internet | Open source | Austin, United States | $251.2M | 65 | |
| Zendesk | Customer Service | Open source | San Francisco, United States | $500K | 65 | |
| Oumi PBC | Artificial Intelligence | Open source | San Francisco, USA | $63.0M | 64 | |
| Intelligent Legal Solutions | LegalTech | Open source | Chicago, USA | $55.9M | 62 | |
| NinjaOne | Software | Open source | Austin, United States | $1.2B | 62 | |
| FossID | Software | Open source | Stockholm, Sweden | $63.0M | 62 | |
| Icometrix | HealthTech | Open source | Antwerp, Belgium | — | 62 | |
| RERelationalAI | Artificial Intelligence | Open source | Berkeley, United States | $144.5M | 61 | |
| NGNGINX | Software | Open source | San Francisco, USA | $56.0M | 60 | |
| Fair Isaac Corporation (FICO) | Financial Services | Open source | Bozeman, United States | — | 60 | |
| Specter Ops | Cybersecurity | Open source | Alexandria, United States | $100.0M | 59 | |
| Axiom Quant | Artificial Intelligence | Open source | San Francisco, United States | $264.0M | 58 | |
| SESeldon | Artificial Intelligence | Open source | London, United Kingdom | $63.0M | 58 | |
| Linear | Software | Open source | San Francisco, United States | $134.0M | 57 | |
| PIPico Immersive | Virtual Reality | Open source | Beijing, China | $397.1M | 56 | |
| United Manufacturing Hub Systems | Manufacturing | Open source · Self-hostable | Cologne, Germany | $5.4M | 54 | |
| Push Protocol | Blockchain | Open source | Mumbai, India | $11.5M | 54 | |
| Tensorlake | Artificial Intelligence | Open source | San Francisco, United States | $8.0M | 54 | |
| Theori | Cybersecurity | Open source | Austin, United States | $15.4M | 54 | |
| MOMozilla Firefox | Internet | Open source · Self-hostable | San Francisco, United States | $2.3M | 53 | |
| InsightFinder | Artificial Intelligence | Open source | San Jose, USA | $15.0M | 52 | |
| NENextcloud | Cloud Computing | Open source · Self-hostable | Nuremberg, Germany | $63.0M | 52 | |
| 64645 Ventures | Venture Capital | Open source | New York, USA | $63.0M | 52 | |
| Domo | Business Intelligence | Open source | American Fork, United States | $33.0M | 50 | |
| AXAxiomatic AI | Artificial Intelligence | Open source | Cambridge, United States | $24.0M | 50 | |
| ZYZymtrace | Artificial Intelligence | Open source | Wilmington, United States | $12.2M | 50 | |
| Respan | Artificial Intelligence | Open source | San Francisco, United States | $5.0M | 49 | |
| Collos | Climate Tech | Open source | Boston, United States | $1.1M | 48 | |
| PAParabol | Software | Open source | London, United Kingdom | $63.0M | 48 | |
| AltStore PAL | Software | Open source | San Francisco, USA | $6.0M | 47 | |
| Antioch | Robotics | Open source | San Francisco, USA | $8.5M | 47 | |
| ARArduino | Open Source | Open source · Self-hostable | Somerville, United States | $54.0M | 46 | |
| Bonterra | Software | Open source | Austin, United States | $63.0M | 46 | |
| Lupin & Holmes | Cybersecurity | Open source | Grenoble, France | $5.9M | 45 | |
| Plumerai | On-Device AI | Open source | London, United Kingdom | $11.3M | 45 | |
| VOVor Systems | Renewable Energy | Open source | San Francisco, USA | $3.0M | 44 | |
| Huper | Artificial Intelligence | Open source | San Francisco, USA | $1.5M | 43 | |
| CGI | IT Services | Open source | Montreal, Canada | $3.3B | 42 | |
| Redgate Software | Software | Open source | Cambridge, United Kingdom | — | 42 | |
| Gryphon Investors | Private Equity | Open source | San Francisco, United States | $63.0M | 41 | |
| Cloud Concierge | IT Support | Open source | San Francisco, United States | — | 30 | |
| Marine Hound | Climate Tech | Open source | Valletta, Malta | — | 21 | |
| VIRES Simulationstechnologie GmbH (now part of AVL) | Autonomous Vehicles | Open source | Augsburg, Germany | — | 21 | |
| RERed Hat | Software | Open source · Self-hostable | Raleigh, USA | — | 20 | |
| APApache HTTP Server | Open Source | Open source · Self-hostable | Wakefield, United States | — | 18 | |
| MOMoltbook | Artificial Intelligence | Open source | San Francisco, United States | — | 15 | |
| Jefsolutions | AI | Open source | — | — | 14 | |
| EUEurostack | Software | Open source · Self-hostable | Europe | — | 10 | |
| EUEuro-Office | Software | Open source · Self-hostable | Europe | — | 10 | |
| OPOpenSearch | Software | Open source | Seattle, USA | — | 6 | |
| GLGLM | Artificial Intelligence | Open source | Beijing, China | — | 3 | |
| SOSoverin | Software | Open source · Self-hostable | Germany | — | 2 | |
| XWXWiki | Software | Open source · Self-hostable | Paris, France | — | 2 |