Fastmail vs Guesty
Side-by-side comparison of features, pricing, and ratings
At a glance
| Dimension | Fastmail | Guesty |
|---|---|---|
| Pricing | freemium · from Individual ¥775/mo (billed yearly; ¥930 month-to-month) | freemium · from Lite $0/mo |
| Best for | Privacy-conscious individuals who want paid email with no ads or data mining, Freelancers and small businesses needing custom domain addresses | Property managers scaling 4-199 listings who need AI-driven automation, Enterprise operators with 200+ listings seeking a customizable PMS |
| Standout features | Custom domain email hosting (you@yourbusiness.com) · Masked Email to generate disposable addresses for signups · Aliases to keep personal and side-project addresses separate | Unified Inbox with ReplyAI™ for auto-generated replies · Multi-Calendar for cross-channel reservation management · AI agents that act, decide, and execute tasks |
| Viability score | 77/100 | 79/100 |
| API | Yes | Yes |
Fastmail is the stronger pick for privacy-conscious individuals who want paid email with no ads or data mining; Guesty fits better for property managers scaling 4-199 listings who need ai-driven automation.
Built from live tool data, last verified 2026-09-14.
Fastmail delivers private, ad-free email hosting with your own domain and Masked Email.
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What real users say: Fastmail vs Guesty
Not marketing copy and not our opinion — a structured sweep of public discussion (reviews, forums, communities and video comments), showing what people praise and what they complain about for each tool.
Fastmail
78 mentions across 5 sources · 70% positive (averaged across 5 sources)
Reddit, Hacker News, Product Hunt, App Store, Lemmy
What users praise
- • Fast web interface and native apps with excellent search.
- • Custom domain support with unlimited aliases and catch-all.
- • Masked Email feature integrates with 1Password and protects privacy.
- • Responsive human support available 24/7.
What frustrates them
- • Spam filtering has degraded, letting through many phishing emails.
- • Billing history and invoices no longer viewable in account.
- • iOS app frequently launches to black screen requiring restart.
- • Tiny font size in iOS app with no setting to adjust it.
Researched Jul 30, 2026
Guesty
42 mentions across 4 sources · 36% positive — critical (averaged across 4 sources)
Hacker News, YouTube, Product Hunt, Bluesky
What users praise
- • AI agent automates guest messaging based on learned preferences (ReplyAI).
- • Multi-calendar sync across 60+ booking channels including Airbnb and Vrbo.
- • Free Lite tier for up to 3 listings provides a risk-free trial.
- • Open API and MCP server allow custom integrations via open-source tools.
What frustrates them
- • Pro and Enterprise pricing not publicly disclosed — reported $65 per property.
- • Channel-specific pricing not possible; rate changes sync everywhere.
- • Custom automation limited compared to Yardi/WorkBeaver according to users.
- • Some users report reliability issues post-2023 acquisition.
Researched Jul 16, 2026
Frequently Asked Questions
Which is better, Fastmail or Guesty?
The best choice between Fastmail and Guesty depends on your specific use case — we compare them independently on features, current pricing, integrations, and real-world signals (with an on-demand sentiment scan available for each). See the side-by-side breakdown above to match them to your needs.
What are the main differences between Fastmail and Guesty?
The key differences include pricing model, feature set, platform support, and skill level requirements. Review the full comparison on RightAIChoice for a detailed breakdown.
Is there a free version of Fastmail or Guesty?
Check the pricing section in the comparison for the latest pricing details on both tools, including free tiers, trial options, and paid plans.
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Last reviewed: July 9, 2026