AI tool comparison
AI Subroutines vs Hermes Agent
Which one should you ship with? Here is the side-by-side panel verdict, pricing read, reviewer split, and community vote comparison.
Automation
AI Subroutines
Record a browser task once, replay it 500x at zero token cost
75%
Panel ship
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Community
Free
Entry
AI Subroutines from rtrvr.ai are a new automation primitive: you record a browser task once (a form submission, a LinkedIn connection, a CRM update), and that recording becomes a deterministic, callable tool that AI agents can invoke with different parameters — without spending tokens on every run. Unlike Playwright, Browser-Use, or other out-of-process solutions, Subroutines execute entirely inside your browser tab, inheriting your live session cookies, CSRF tokens, and signed headers automatically. The technical approach is clever. During recording, the system captures network requests and DOM interactions, then ranks captured requests to identify the actual API call (filtering out analytics and telemetry). Replay-hostile identifiers are stripped while stable endpoints are preserved. The result is a script that runs in your browser context — no session rebuilding, no key extraction, no proxy rotation needed. The AI handles parameter selection; the script handles execution. The business case is clear for outreach and operations teams: bulk LinkedIn campaigns, CRM mass-updates, scraping pipelines, and form submissions that would cost hundreds of tokens per run instead execute as cheap deterministic scripts. The model positions Subroutines as the "function call" layer beneath AI agents — the actions that don't need intelligence every time they fire.
AI Agents
Hermes Agent
Self-improving personal AI agent that generates its own skills from experience
75%
Panel ship
—
Community
Paid
Entry
Hermes Agent is an open-source personal AI agent from NousResearch with a genuinely unusual architecture: it autonomously generates and refines its own skills from past interactions, building up a growing library of reusable capabilities over time. Unlike static agents that behave identically on day one and day 1,000, Hermes learns what works for you and systematizes it. V0.8.0 (released today) builds on the resilience improvements from v0.7.0 and adds enhanced MCP server compatibility, improved multi-platform messaging support (Telegram, Discord, Slack, WhatsApp, Signal), and more robust cron scheduling for automated tasks. The agent supports every major LLM provider through OpenRouter, OpenAI, and Anthropic APIs, and can be deployed locally, via Docker, SSH, or Modal. With 35.1k GitHub stars and 4,500+ forks across 3,496 commits, Hermes Agent is one of the most actively developed personal agent frameworks. The skill generation loop is the headline feature: when Hermes successfully completes a new type of task, it packages the approach as a reusable skill and adds it to a personal skill library — effectively getting faster and more capable at your specific workflows without retraining.
Reviewer scorecard
“The 'record once, replay many' pattern solves a real cost problem in agent pipelines. The in-browser execution model is clever — you get auth context for free instead of fighting with session management. This is the kind of tool that drops into existing workflows without requiring a rewrite.”
“The skill generation loop is architecturally clever — instead of getting better through fine-tuning, it gets better through structured experience. 35k stars and 3,496 commits means this is actually maintained, not just a weekend project that went viral. MCP compatibility opens up a massive ecosystem of integrations out of the box.”
“Browser automation that runs inside your session is exactly the attack surface that malicious sites exploit. Subroutines executing in-tab with full cookie access means a compromised script could do real damage. The 'zero token cost' claim also obscures that you still need LLM calls for parameter selection — the savings are real but overstated.”
“Self-modifying agents that generate their own skills are notoriously hard to debug and audit. How do you know a generated skill is doing what you think? The multi-platform messaging support is a significant attack surface — an agent with access to your Slack, Discord, Signal, and WhatsApp is a single misconfiguration away from a serious data leak.”
“This is the 'compilation' step for agentic workflows — moving from 'LLM decides every click' to 'LLM selects a pre-compiled action.' That separation of concerns (intelligence vs. execution) is how you scale agent operations from one-off demos to production pipelines. The pattern will be widely copied.”
“Hermes Agent is an early proof-of-concept for what AGI researchers call 'lifelong learning' applied to practical agents. If skill generation stabilizes and the skill library becomes shareable, you could imagine community skill marketplaces where agents improve based on the collective experience of thousands of users. That's a genuinely new paradigm.”
“For creators doing outreach, social posting, or newsletter campaigns, this is genuinely transformative. Recording a campaign action once and letting AI handle personalization at scale is the efficiency unlock that makes solo creator businesses actually viable at volume.”
“The multi-platform messaging support makes this viable as a genuine personal assistant — not just a coding tool. An agent that can reach me wherever I am and gets smarter about my workflows over time is the dream. The setup complexity is real, but for technically-inclined creators willing to invest the time, this is worth exploring.”
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