Comparison

Atomic Hermes vs Vellum Assistant

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

Head to head
About

Atomic Hermes

This AI agent performs complex, multi-step tasks autonomously on your behalf. It plans, reasons, and executes actions across devices, offering smart web research, content generation, and code assistance. Your data remains private as the agent runs on your own hardware.

Highlights
  • Autonomous task execution
  • Intelligent AI agents
  • Smart web search and research
  • Content writing and editing
  • Code debugging and problem-solving
  • Task planning and scheduling
  • Cross-device compatibility
Features
Read full description

Atomic Hermes is your AI agent that actually does the work! Unlike basic AI chatbots, Atomic Hermes runs autonomous agents from your phone that can plan, reason, and execute multi-step tasks on your behalf. Ask once, get it done. WHAT ATOMIC HERMES CAN DO - Autonomous task execution with intelligent AI agents - Smart web search and research with summarized results - Writing, editing, and generates content that's ready to use - Helps with code: debugging, fixes, and step-by-step problem solving - Task planning and scheduling - Works across your devices seamlessly - Keeps working 24/7 WHY ATOMIC HERMES Most AI apps are just a chat window wrapped around a model. Atomic Hermes runs a real agent — one that breaks down your goal, takes steps to complete it, and shows its work. You stay in control, it does the heavy lifting. CONNECT YOUR OWN INSTANCE Atomic Hermes isn't another cloud chatbot. It's a mobile control panel for an agent that lives on your hardware. Spin up your instance, connect via a secure tunnel, and your phone becomes the remote for a tireless AI worker — wherever you are. - Self-hosted: your agent runs where you choose - Remote access: reach it securely from anywhere - Always on: long-running tasks keep going without you babysitting them YOUR DATA STAYS YOURS Because the agent runs on infrastructure you control, your work doesn't pass through our servers. No selling your data, no mining your conversations — there's nothing for us to mine. BUILT ON HERMES AGENT Powered by Hermes Agent, the open-source agent framework from Nous Research, trusted by developers and power users worldwide. PERFECT FOR - Builders and power users who want a real agent, not a toy - Privacy-conscious people who'd rather self-host than hand over their data - Anyone who wants AI that takes action, not just talks Privacy Policy: https://atomicbot.ai/privacy-policy Terms of Service: https://atomicbot.ai/terms-of-service

About

Vellum Assistant

This AI assistant learns your work habits and thought processes to help you stay on top of tasks. It syncs across devices, providing quick summaries of communications and access to past notes. Over time, it becomes an indispensable teammate.

Highlights
  • Learns user work habits
  • Syncs across Mac, iPhone, and web
  • Summarizes Slack, email, and meetings
  • Remembers forgotten tasks and follow-ups
  • Accesses past notes and thoughts
  • Improves with continued use
Features
Read full description

vellum is your personal AI for work and life. It learns how you think, remembers what matters, and helps with the things you care about. With vellum, you're always in control: • Choose where your data lives: vellum Cloud or your own self-hosted vellum • Use any model, bring your own API key, or use vellum-optimized models • Decide what your assistant can access and remember Talk, text, or show vellum what you see with your camera, then use it to: • Catch up on email, Slack, and meetings • Remember follow-ups, tasks, and important details • Plan your day, trips, meals, or workouts • Find old notes, files, and saved links • Think through work and personal decisions • Get help with whatever is in front of you One assistant across iPhone, Mac, and web. Always caught up on what matters to you.

Screenshots

Atomic Hermes3 screens
Vellum Assistant4 screens

Verdict

The call

The clearest difference is review sentiment: Vellum Assistant at 80% against Atomic Hermes's 0%. Vellum Assistant also leads on rating (4.4 vs 2.3) and in-app purchases (none vs 3). Atomic Hermes's advantage is iOS requirement (13.4 vs 17.0). 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. Atomic Hermes sells 3 in-app purchases, starting at $19.99 per month. Vellum Assistant asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Vellum Assistant holds the better App Store score, 4.4 against 2.3. That said, the two scores are not equally well evidenced: Vellum Assistant has 17 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Atomic Hermes's written reviews are positive against 80% of Vellum Assistant's.

UpkeepUpdate frequency

Atomic Hermes ships an update every 11 days, Vellum Assistant every 4 days. The most recent releases landed on September 7, 2026 and September 16, 2026 respectively.

Scorecard7 real differences · 3 level
Atomic Hermes versus Vellum Assistant: the parameters behind the verdict, then further details
ParameterAtomic HermesVellum Assistant
PriceFreeFree
Rating2.3 (3 ratings)4.4 (17 ratings) — better
Positive reviews0.0% of reviews80.0% of reviews — better
Number of ratings317 — better
Update frequencyEvery 11 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.4 — better17.0
Further details — not scored
Size75 MB9 MB
Age rating4+17+
DeveloperAtomic MailVocify Inc.

Customer experience

Atomic Hermes

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Vellum Assistant

All ratings17 ratings
Positive82.4%
Neutral5.9%
Negative11.8%
Written reviews10 reviews
Positive80.0%
Neutral10.0%
Negative10.0%

In-app purchases

3 purchases

Atomic Hermes

Subscriptions1
  • Atomic Bot Monthly$19.991 Month
One-time2
  • 10 Credits$10.00
  • 30 Credits$30.00
None

Vellum Assistant

No in-app purchases

Questions

Is Atomic Hermes free?
Atomic Hermes is free to download, with in-app purchases available.
Is Vellum Assistant free?
Vellum Assistant is free to download, with no in-app purchases.
Which has better reviews, Atomic Hermes or Vellum Assistant?
Vellum Assistant is rated higher. Atomic Hermes averages 2.3 out of 5 from 3 ratings, while Vellum Assistant averages 4.4 from 17 ratings.
Do Atomic Hermes or Vellum Assistant have ads?
Neither Atomic Hermes nor Vellum Assistant shows ads.
Which is updated more often, Atomic Hermes or Vellum Assistant?
Atomic Hermes ships an update every 11 days, and Vellum Assistant every 4 days. Most recently, Atomic Hermes was updated on September 7, 2026 and Vellum Assistant on September 16, 2026.

Other comparisons