Comparison

OptMsg vs Kazzle

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OptMsg

This email app offers unparalleled privacy and security with 100% inbox control. Only approved senders can reach you, and all messages are fully encrypted. Enjoy a distraction-free, password-free experience with no ads or data tracking.

Highlights
  • 100% inbox control with approved senders
  • Password-free authentication via Passkeys
  • End-to-end encryption for secure messaging
  • No ads, no tracking, no data mining
  • Auto-delete trash after 30 days
  • Community recommendations for new senders
Features
Read full description

OptMsg: Private, Secure, Simple Email Everyone else decides what lands in your inbox. A retailer you bought from once. A list you never joined. A message pretending to be your bank. OptMsg puts that decision back with you. OptMsg is patent-pending opt-in email: mail from a sender you have not approved goes straight to Trash, and Trash empties itself after 30 days. You decide who gets in, and you can change your mind at any time. You Decide Who Gets In • Mail from senders you haven't approved goes to Trash, not your Inbox. • Easily grant or revoke access to your inbox. • Auto-delete trash after 30 days—no clutter, no wasted space. Private Always • Fully encrypted for secure messaging between OptMsg users. • Mail you send to an address outside OptMsg may still be read or monetized by that provider. • OptMsg does not scan your emails to sell ads. • No ads. We don't collect your personal data to sell to advertisers. Security First • No Passwords – protect your inbox and your other online accounts • Uses Passkeys for seamless, password-free authentication • Your OptMsg account has no password, so a password stolen from another site can't open your inbox. Simple by Design • Clean, intuitive design for effortless email management. • No complicated settings—just straightforward, secure communication. • Reliable performance to keep your inbox running smoothly. Other Key Features • A new clean, @optmsg.com email address others can trust • Send and receive emails and attachments with ease • Keep your inbox tidy and clean with tags and simple swipe-gestures • Receive important notifications • Manage your contacts • Use Community Recommendations to identify new senders of interest • Make OptMsg your default email app We're constantly improving OptMsg — new features, and steady work on email security. Create Your Account. Your Inbox. Your Rules.

About

Kazzle

Features
Read full description

Turn an idea into a working app, website, or AI agent. Describe what you want in plain language and Kazzle builds it, tests it, and helps you ship it. Build apps and websites. Create useful software without starting from a blank project. Kazzle can build the interface, backend, accounts, database, and live link, then make changes from your feedback. Create AI agents. Build agents with their own instructions, tools, memory, conversations, and computers. Use them yourself or connect them to the products you create. Go from idea to live product. Kazzle writes and runs real code, tests its work, and handles previews, hosting, and deployment. Open the result, use it, and keep improving it through conversation. Automate recurring work. Set up scheduled research, reports, inbox summaries, customer follow-ups, data updates, and other work that should run on its own. Browse and research with AI. Use Kazzle as a browser with tabs, bookmarks, history, ad blocking, and autofill. Ask it to compare sources, summarize pages, collect information, or turn research into a clear next step. Create more than software. Turn a topic, notes, or research into presentations, reports, documents, and other useful outputs. Keep control. Review the work, request changes in plain language, and approve important actions when needed. Available on mobile and desktop. Privacy policy: https://kazzle.com/legal#privacy Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/appstore/dev/stdeula/

Screenshots

OptMsg4 screens
Kazzle4 screens

Verdict

The call

The clearest difference is in-app purchases: OptMsg at none against Kazzle's 8. OptMsg also leads on iOS requirement (15.0 vs 17.0). Kazzle's advantage is update cadence (every 2 days vs monthly). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kazzle sells 8 in-app purchases, starting at $28.99 per month. OptMsg asks for nothing beyond the download.

UpkeepUpdate frequency

OptMsg ships an update monthly, Kazzle every 2 days. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 7 level
OptMsg versus Kazzle: the parameters behind the verdict, then further details
ParameterOptMsgKazzle
PriceFreeFree
Rating5.0 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyMonthlyEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size61 MB133 MB
Age rating4+17+
DeveloperOptMsg, LLCKazzle

In-app purchases

None

OptMsg

No in-app purchases

8 purchases

Kazzle

Subscriptions3
  • Basic (20 credits/mo)$28.991 Month
  • Pro (50 credits/mo)$71.991 Month
  • Ultra (100 credits/mo)$142.991 Month
One-time5
  • 1,000 credits$14.99
  • 2,000 credits$28.99
  • 5,000 credits$71.99
Show 2 more
  • 10,000 credits$142.99
  • 20,000 credits$289.00

Questions

Is OptMsg free?
OptMsg is free to download, with no in-app purchases.
Is Kazzle free?
Kazzle is free to download, with in-app purchases available.
Do OptMsg or Kazzle have ads?
Neither OptMsg nor Kazzle shows ads.
Which is updated more often, OptMsg or Kazzle?
OptMsg ships an update monthly, and Kazzle every 2 days. Most recently, OptMsg was updated on October 4, 2026 and Kazzle on October 3, 2026.

Other comparisons