Comparison

OptMsg vs Upstream

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

Upstream

This AI-powered inbox automatically organizes emails, drafts replies in your unique writing style, and sends follow-ups. It learns your workflow to minimize distractions and ensure no important messages are missed.

Highlights
  • AI email triaging
  • Personalized draft writing
  • Automated follow-ups
  • Self-organizing inbox
  • Learns user workflow
Features
Read full description

An AI inbox that triages itself, drafts in your voice, and follows up so you don’t have to remember to. ORGANIZE EMAILS YOUR WAY Upstream sorts, flags, and surfaces what needs your attention today. Noise gets filed away. No rules to set up or folders to maintain. It learns how you work and gets out of your way. DRAFTS IN YOUR VOICE. NOT A VOICE. Upstream writes like you. Not like AI pretending to be you. It studies how you write, how you talk to this specific person, and what the thread already sounds like, then drafts from there. The reply is waiting before you've finished reading the email. THE FOLLOW-UP WRITES ITSELF Upstream watches the threads going quiet, writes the nudge, and adds it to your inbox to send. The open loops close themselves. The ball never gets dropped.

Screenshots

OptMsg4 screens
Upstream4 screens

Verdict

The call

The clearest difference is review sentiment: OptMsg at 100% against Upstream's 50%. OptMsg also leads on rating (5.0 vs 3.7). Upstream's advantage is update cadence (every 2 weeks vs monthly). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

OptMsg holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 100% of OptMsg's written reviews are positive against 50% of Upstream's.

UpkeepUpdate frequency

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

Scorecard3 real differences · 7 level
OptMsg versus Upstream: the parameters behind the verdict, then further details
ParameterOptMsgUpstream
PriceFreeFree
Rating5.0 (5 ratings) — better3.7 (3 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings5 — better3
Update frequencyMonthlyEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size61 MB87 MB
Age rating4+4+
DeveloperOptMsg, LLCUpstream Labs

Customer experience

OptMsg

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Upstream

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

OptMsg

No in-app purchases

None

Upstream

No in-app purchases

Questions

Is OptMsg free?
OptMsg is free to download, with no in-app purchases.
Is Upstream free?
Upstream is free to download, with no in-app purchases.
Which has better reviews, OptMsg or Upstream?
OptMsg is rated higher. OptMsg averages 5.0 out of 5 from 5 ratings, while Upstream averages 3.7 from 3 ratings.
Do OptMsg or Upstream have ads?
Neither OptMsg nor Upstream shows ads.
Which is updated more often, OptMsg or Upstream?
OptMsg ships an update monthly, and Upstream every 2 weeks. Most recently, OptMsg was updated on October 4, 2026 and Upstream on October 2, 2026.

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