Shortwave vs Spark AI
A detailed side-by-side comparison to help you choose the right AI email management agent for your needs.
Best for team collaboration and AI summaries
Shortwave
Shortwave reimagines email as a collaborative workspace with Ghostwriter that learns your unique writing voice and style to generate contextual responses. AI Summaries appear at thread tops, condensin...
AI Models
GPT-4Proprietary models
Key Features
- Ghostwriter learns your writing voice for contextual responses
- AI Summaries at thread tops condense conversations
- Smart Bundles group related emails, 45% faster inbox zero
- Tasklet automation: Slack, Calendar, Notion, Asana, HubSpot via plain English
- Built-in calendar with AI scheduling and conflict checking
Pricing
Free — $0
Personal — $8.50/month
Business — $18-24/user/month
Pros
- AI Summaries save time on long threads
- Tasklet automation genuinely connects email to workflows
- Smart Bundles accelerate batch processing
Cons
- Gmail-only currently, no Outlook support
- Free tier AI usage limits
Best for shared inboxes and teams
Spark AI
Spark AI provides Smart Inbox that auto-categorizes messages into Personal, Newsletters, and Notifications, ensuring important personal emails surface above bulk messages. Email assignment with deadli...
AI Models
Proprietary Spark AI
Key Features
- Smart Inbox: Personal, Newsletters, Notifications auto-categorization
- Email assignment with deadlines for team distribution
- Shared drafts with real-time collaborative editing
- Team comments for private discussion on emails
- Shared inboxes for team@ addresses
Pricing
Free — $0
Premium — $4.99/month
Teams — $6.99/user/month
Pros
- Shared inbox features exceptional for team email
- Collaborative drafting streamlines important responses
- Strong free tier for individual use
Cons
- AI capabilities less advanced than dedicated AI-first tools
- Teams tier required for collaboration features