Alternatives to Rubywriter
The top AI Writing Assistant companies similar to Rubywriter, ranked by relevance (named competitors first, then how closely their sectors overlap) and our 0-100 AI-readiness score. Each links to a full profile with funding and team.
Jasper62MarketingAustin, United States$10.0M
Copy.ai59AI Content MarketingSan Francisco, United States$3.0M
Writesonic44Agentic AI$2.5M
JotBot23AI Writing AssistantTel Aviv, Israel
Contilt30Personal
Pistuk Technologies27AI Tools & AppsTel Aviv, Israel$1.0M
GPTHuman18Generative AI
Clipbook10Generative AITel Aviv, Israel$1.5M
byword9Artificial Intelligence
WispforgeAI Tool- ThoughtsatworkAI Search EngineTel Aviv, Israel$1.0M
TextCortex AIAI Writing AssistantBerlin, Germany$3.0M
Grammarly74Artificial IntelligenceSan Francisco, United States$3.2B
Viktor62Artificial IntelligenceWarsaw, Poland$66.2M- HIHighlight AI61Agentic AISan Francisco, United States$40.0M
Writer56AI InfrastructureSan Francisco, United States$107.0M- STSTAGE54Live VideoNew York, United States
M Magical54Artificial IntelligenceSan Francisco, United States$12.0M
neuroflash52AI Tools & AppsMunich, Germany$2.0M
Mem.ai51Knowledge ManagementNew York, United States$29.1M
Clearscope50SEOSan Francisco, United States$3.0M
Tebi50Generative AITel Aviv, Israel$86.0M- KRKreo47Generative AITel Aviv, Israel$12.0M
- CICinnamon43Generative AITokyo, Japan$1.0M
Ballistic Labs42AI Tools & AppsSan Francisco, United States
Xampla41Generative AILondon, United Kingdom$23.3M
Qneiform40Generative AITel Aviv, Israel$6.2M
Castmagic38Voice AISan Francisco, United States$2.0M
AudioStack37AI Voice SynthesisLondon, United Kingdom$1.5M
Harmonic AI36Foundation ModelSan Francisco, United States$142.0M
ZIGI AI35Enterprise$1.5M- ANAnimerra34Generative AITel Aviv, Israel$1.5M
Genspark34Agentic AISan Francisco, United States- NONoteless34AI Search EngineSan Francisco, United States$39.1M
Taskade33SpaceTechNew York, United States
Fiore Health33Agentic SEO
Marvinn.ai31Generative AITel Aviv, Israel- LILightbase30Generative AITel Aviv, Israel$25.3M
Icon28AdTechNew York, United States$1.0M
Geb AI27Generative AITel Aviv, Israel
Smodin26EdTech
usermuse26Generative AITel Aviv, Israel$1.0M
Notis25Agentic AITel Aviv, Israel$1.2M
Genrate25Generative AITel Aviv, Israel$1.5M
Buscaro24Generative AITel Aviv, Israel$2.8M
JustDone24AI Search EngineNew York, United States
Overmatter24Generative AISan Francisco, United States
Oterra.ai24Generative AITel Aviv, Israel
Notion AI22AI CopilotSan Francisco, United States- Thebunny21Generative AI
WispAI21AI Tools & AppsSan Francisco, United States$1.0M
Cohesive10Artificial IntelligenceLondon, United Kingdom- RArankai10Artificial IntelligenceTel Aviv, Israel$1.0M
CloneViral10AI Video Generation
Curvestone AI10AI Tools & AppsTel Aviv, Israel$4.0M
Renewcast10Generative AITel Aviv, Israel$2.2M
Chunshuiai8Generative AI- KLklap8Artificial IntelligenceTel Aviv, Israel
- AIAiFilePro6AI Search EngineTel Aviv, Israel
NovaVoice 0AI DictationSan Francisco, United States$1.2M
| Company | Sector | HQ | Funding | Score |
|---|---|---|---|---|
| Jasper | Marketing | Austin, United States | $10.0M | 62 |
| Copy.ai | AI Content Marketing | San Francisco, United States | $3.0M | 59 |
| Writesonic | Agentic AI | — | $2.5M | 44 |
| JotBot | AI Writing Assistant | Tel Aviv, Israel | — | 23 |
| Contilt | Personal | — | — | 30 |
| Pistuk Technologies | AI Tools & Apps | Tel Aviv, Israel | $1.0M | 27 |
| GPTHuman | Generative AI | — | — | 18 |
| Clipbook | Generative AI | Tel Aviv, Israel | $1.5M | 10 |
| byword | Artificial Intelligence | — | — | 9 |
| Wispforge | AI Tool | — | — | — |
| AI Search Engine | Tel Aviv, Israel | $1.0M | — | |
| TextCortex AI | AI Writing Assistant | Berlin, Germany | $3.0M | — |
| Grammarly | Artificial Intelligence | San Francisco, United States | $3.2B | 74 |
| Viktor | Artificial Intelligence | Warsaw, Poland | $66.2M | 62 |
| HIHighlight AI | Agentic AI | San Francisco, United States | $40.0M | 61 |
| Writer | AI Infrastructure | San Francisco, United States | $107.0M | 56 |
| STSTAGE | Live Video | New York, United States | — | 54 |
| M Magical | Artificial Intelligence | San Francisco, United States | $12.0M | 54 |
| neuroflash | AI Tools & Apps | Munich, Germany | $2.0M | 52 |
| Mem.ai | Knowledge Management | New York, United States | $29.1M | 51 |
| Clearscope | SEO | San Francisco, United States | $3.0M | 50 |
| Tebi | Generative AI | Tel Aviv, Israel | $86.0M | 50 |
| KRKreo | Generative AI | Tel Aviv, Israel | $12.0M | 47 |
| CICinnamon | Generative AI | Tokyo, Japan | $1.0M | 43 |
| Ballistic Labs | AI Tools & Apps | San Francisco, United States | — | 42 |
| Xampla | Generative AI | London, United Kingdom | $23.3M | 41 |
| Qneiform | Generative AI | Tel Aviv, Israel | $6.2M | 40 |
| Castmagic | Voice AI | San Francisco, United States | $2.0M | 38 |
| AudioStack | AI Voice Synthesis | London, United Kingdom | $1.5M | 37 |
| Harmonic AI | Foundation Model | San Francisco, United States | $142.0M | 36 |
| ZIGI AI | Enterprise | — | $1.5M | 35 |
| ANAnimerra | Generative AI | Tel Aviv, Israel | $1.5M | 34 |
| Genspark | Agentic AI | San Francisco, United States | — | 34 |
| NONoteless | AI Search Engine | San Francisco, United States | $39.1M | 34 |
| Taskade | SpaceTech | New York, United States | — | 33 |
| Fiore Health | Agentic SEO | — | — | 33 |
| Marvinn.ai | Generative AI | Tel Aviv, Israel | — | 31 |
| LILightbase | Generative AI | Tel Aviv, Israel | $25.3M | 30 |
| Icon | AdTech | New York, United States | $1.0M | 28 |
| Geb AI | Generative AI | Tel Aviv, Israel | — | 27 |
| Smodin | EdTech | — | — | 26 |
| usermuse | Generative AI | Tel Aviv, Israel | $1.0M | 26 |
| Notis | Agentic AI | Tel Aviv, Israel | $1.2M | 25 |
| Genrate | Generative AI | Tel Aviv, Israel | $1.5M | 25 |
| Buscaro | Generative AI | Tel Aviv, Israel | $2.8M | 24 |
| JustDone | AI Search Engine | New York, United States | — | 24 |
| Overmatter | Generative AI | San Francisco, United States | — | 24 |
| Oterra.ai | Generative AI | Tel Aviv, Israel | — | 24 |
| Notion AI | AI Copilot | San Francisco, United States | — | 22 |
| Generative AI | — | — | 21 | |
| WispAI | AI Tools & Apps | San Francisco, United States | $1.0M | 21 |
| Cohesive | Artificial Intelligence | London, United Kingdom | — | 10 |
| RArankai | Artificial Intelligence | Tel Aviv, Israel | $1.0M | 10 |
| CloneViral | AI Video Generation | — | — | 10 |
| Curvestone AI | AI Tools & Apps | Tel Aviv, Israel | $4.0M | 10 |
| Renewcast | Generative AI | Tel Aviv, Israel | $2.2M | 10 |
| Chunshuiai | Generative AI | — | — | 8 |
| KLklap | Artificial Intelligence | Tel Aviv, Israel | — | 8 |
| AIAiFilePro | AI Search Engine | Tel Aviv, Israel | — | 6 |
| NovaVoice | AI Dictation | San Francisco, United States | $1.2M | 0 |