AEVS vs GhostWriter by MyHandler: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of AEVS and GhostWriter by MyHandler — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
AEVS
Fetch.ai
Open-source SDK that creates tamper-evident, cryptographically signed receipts for every tool call an AI agent makes.
Key features
- Signed Receipts: Records every tool call and seals it with an ECDSA P-256 signature backed by KMS.
- Hash-Chained Logs: Links each receipt to the previous one so tampering or skipped steps are detectable.
- Independent Verification: Confirms signatures via a public API or explorer using only a reference ID.
- Drop-In SDK: Installs with pip and wraps existing tools without changing them.
- Framework Auto-Detection: Automatically integrates with LangChain and MCP-based agents.
- Open Source: Released as fetchai/AEVS-sdk for Python 3.10–3.13.
Best for
- Agent Auditing: Keep a verifiable record of exactly what an agent did and when.
- High-Stakes Actions: Prove execution of sensitive operations such as payments or refunds.
- Compliance Evidence: Provide tamper-evident logs for regulated or accountable workflows.
- Debugging Agents: Inspect tool inputs, outputs, timing, and errors for each call.
- Third-Party Verification: Let external parties confirm an action occurred without sharing source code.
GhostWriter by MyHandler
MyHandler.ai
Windows writing assistant that reads the screen around your cursor on a hotkey double-tap and types a context-aware draft in your voice.
Key features
- Hotkey Double-Tap Drafting: No prompt or dictation is needed — a double-tap with the cursor in any text field triggers capture and drafting directly in place.
- Screen Context Capture: Reads the thread, form or partial sentence surrounding the cursor locally on the machine, using that on-screen context as the entire input.
- Writing Intent Classification: Determines whether the moment calls for a reply, a continuation, a filled-in answer or a fresh compose before writing a single word.
- Sender and Identity Mapping: Maps each message in a thread to its sender and works out which handle is the user's, so the draft answers the other party rather than the user's own words.
- Calendar Cross-Check: When a draft proposes a time, it is validated against the next two weeks of a connected calendar before the text appears.
- Selection Rewriting: Selecting existing text before the hotkey rewrites that selection instead of composing something new.
- Nothing Sent Automatically: The generated text appears at the cursor for the user to read, edit or delete; sending always remains a manual step.
- Local Vault with Zero-Retention Cloud: Capture runs against an encrypted vault on the user's own PC and the assembled context is processed by a zero-data-retention cloud model.
Best for
- Email Backlog: Clearing a queue of owed replies by drafting each one from the thread already on screen instead of retyping the same answer.
- Chat and Slack Replies: Answering a message in a team chat where the draft is grounded in who asked whom for what in the visible thread.
- Web Form Completion: Filling a blank answer box under a question on a web form or application without switching to a separate chat window.
- Sentence Continuation: Picking up a half-written paragraph exactly where it stops, without the assistant restating what was already typed.
- Meeting Scheduling Replies: Responding to a request for a time with a proposal that has already been checked against the user's calendar.
- Tone-Sensitive Rewrites: Selecting a blunt or rough draft and having it rewritten in the user's own voice before sending.