Apps like Proton Calendar: Secure Events
15 alternatives to Proton Calendar: Secure Events in Productivity, ranked by our opportunity score from live revenue and download estimates — updated continuously, not a static list.
ChatGPTProductivity · $120M–$410M/mo
Claude by AnthropicProductivity · $15M–$51M/mo
Grok AIProductivity · $5.4M–$18M/mo
Dropbox: Cloud Storage BackupProductivity · $1.6M–$5.3M/mo
CamScanner - PDF Scanner AppProductivity · $890k–$5.6M/mo
Microsoft OneDriveProductivity · $820k–$5.2M/mo
Meta AIProductivity · $890k–$4.8M/mo
Microsoft WordProductivity · $800k–$5.1M/mo
Perplexity - AI Search & ChatProductivity · $790k–$5.0M/mo
Gmail - Email by GoogleProductivity · $760k–$4.9M/mo
ChatOn AI - Chat Bot AssistantProductivity · $760k–$4.8M/mo
Google DocsProductivity · $790k–$4.3M/mo
Text to Speech - Listen AIProductivity · $720k–$4.6M/mo
Evernote: AI Notes & NotebookProductivity · $710k–$4.5M/mo
Microsoft ExcelProductivity · $690k–$4.4M/mo