Shortwave vs Spark AI: Which AI agent is better?
Compare pricing, AI models, integrations, security posture, pros, cons, and buyer fit before choosing the right AI email management agent for your workflow.
Verdict: Shortwave vs Spark AI
Pick Shortwave if you need team collaboration and ai summaries. Pick Spark AI if you need shared inboxes and teams.
Spark AI wins on price.
Shortwave supports 2 models.
Shortwave integrates with 7 platforms.
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...
- 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
- AI Summaries save time on long threads
- Tasklet automation genuinely connects email to workflows
- Smart Bundles accelerate batch processing
- Gmail-only currently, no Outlook support
- Free tier AI usage limits
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...
- 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
- Shared inbox features exceptional for team email
- Collaborative drafting streamlines important responses
- Strong free tier for individual use
- AI capabilities less advanced than dedicated AI-first tools
- Teams tier required for collaboration features
Who should buy this
Shortwave
- Team that operates over shared inboxes (sales@, support@) and wants AI triage + assignment
- Founder or PM coordinating with co-workers via email needing thread summaries
- Productivity buff who wants Tasklet automations connecting Gmail to Slack/Notion/Linear
- Outlook-only orgs (Gmail-only client today)
- Buyers wanting fully-private email AI (Shortwave routes through cloud LLMs)
Solo: ~$8.50–$18/mo (Personal/Pro). Team: $24/seat/mo Business or $36/seat Premier. Heavy AI users: $100/seat Max. Enterprise: custom.
Verified 2026-05-02
Spark AI
- Team that operates over shared inboxes (sales@, support@) and wants collaborative drafting
- Solo user wanting Apple Mail / Gmail / Outlook coverage in one client
- Privacy-conscious user preferring an established email client over startup tools
- Power users wanting Superhuman-level keyboard speed
- Buyers needing CRM-grade integration (Mailbutler / Superhuman fit better)
Solo: Free tier or $4.99/mo Premium. Power user: $8.25/mo Plus. Team / shared inbox: $16.58/seat/mo Pro.
Verified 2026-05-03
Capabilities at a glance
| Capability | Shortwave | Spark AI |
|---|---|---|
| AI thread summaries | — | |
| Ghostwriter (voice-trained replies) | — | |
| Smart Bundles auto-grouping | — | |
| Tasklet automations to other tools | Slack, Calendar, Notion, Asana, HubSpot | — |
| Email provider support | Gmail-only | Gmail, Outlook, Apple Mail, Yahoo, IMAP |
| Team / shared inbox features | Business+ | — |
| Shared inbox + collaborative drafting | — | Pro tier |
| AI writing + smart replies | — | Premium+ |
| Cross-account unified inbox | — | |
| Mobile + desktop clients | — | iOS, macOS, Android, Windows |
| Public API | — |
Security & compliance
| Standard / control | Shortwave | Spark AI |
|---|---|---|
| GDPR | ||
| SSO / SAML | — | |
| Trains on customer data | No | — |
What users say
Frequently asked questions
Which is cheaper, Shortwave or Spark AI?+
Shortwave's Personal plan is $8.50/month and Spark AI's Premium plan is $4.99/month. Spark AI is the cheaper entry point.
What AI models do Shortwave and Spark AI use?+
Shortwave runs on GPT-4, Proprietary models. Spark AI runs on Proprietary Spark AI.
What is the main difference between Shortwave and Spark AI?+
Shortwave is positioned as best for team collaboration and ai summaries, while Spark AI is positioned as best for shared inboxes and teams. Pick the one whose strength aligns with your primary use case.
Which has better integrations, Shortwave or Spark AI?+
Shortwave integrates with Gmail, Slack, Calendar, Notion and 3 more. Spark AI integrates with Gmail, Outlook, iCloud, Yahoo and 2 more.
What are the main weaknesses of Shortwave and Spark AI?+
Shortwave's main drawback: gmail-only currently, no outlook support. Spark AI's main drawback: ai capabilities less advanced than dedicated ai-first tools.
Are Shortwave and Spark AI worth it in 2026?+
Both remain competitive email management options in 2026. Shortwave stands out for ai summaries save time on long threads. Spark AI stands out for shared inbox features exceptional for team email. Choose based on which trade-offs fit your workflow and budget.