An AI executive assistant can help prepare briefings, organize follow-ups, draft replies and produce recurring reports. Choose one by the administrative work you need completed: calendar scheduling, connected-app actions or a reviewed document. The label alone does not tell you which accounts it can access, what it can change or whether it remembers your corrections.
For calendar time blocking, evaluate Reclaim. For connected-app briefings and follow-ups, examine Lindy’s supported workflows. For file-based preparation and documents, consider Claude Cowork. For recurring work with persistent project context and managed setup, evaluate Brainmox. The comparison below explains where each approach fits and what to test.
Disclosure: Brainmox publishes this guide and is included in the comparison. Competitor details come from official documentation checked October 7, 2026, not hands-on competitor testing. Brainmox costs $299 USD/month or $2,990/year and requires an invitation code from an existing member. Our linked output examples are founder-run tests using fictional data. The recurring schedule below is an illustrative setup, not a demonstrated unattended workflow.
Compare AI executive assistants by the responsibility
| Assistant | Work to evaluate | Access and cost |
|---|---|---|
| Reclaim | Schedule task blocks around meetings and deadlines. Inspect how conflicts and changed priorities affect the calendar. | Free Lite plan and paid seat-based tiers. Plans. |
| Lindy | Prepare briefings and follow-ups using connected business apps. Verify the specific read and write actions your workflow requires. | Credit-based plans; compare included usage with the frequency of your workflow. Current pricing. |
| Claude Cowork | Prepare meeting documents and reports from permitted sources; evaluate scheduled tasks and the resulting files. | Paid-plan access and usage limits; check availability on your chosen surface. Plans. |
| Brainmox | Carry project context between sessions, prepare Gmail drafts and schedule recurring work using supported tools. | $299 USD/month or $2,990/year for one assistant, private beta by member invitation. Included scope and terms. |
Choose Reclaim when allocating time is the main problem. Its task scheduling works around meetings, deadlines and availability and adapts calendar blocks as plans change. A scheduled preparation block is different from a completed briefing: confirm which result you need. Reclaim task scheduling.
Evaluate Lindy when the work spans supported business apps. Its product overview describes connected-app access, scheduled briefings and recurring follow-ups. Check whether it supports the exact action you need in each account, where you review the result and how repeated runs consume credits. Lindy product overview.
Evaluate Claude Cowork when the deliverable is a document or file. Its documentation describes projects, memory and scheduled tasks. Cloud sessions and local-computer access have different requirements: local files and the local browser depend on the desktop connection. Test with the sources and environment you will actually use. Cowork documentation.
Evaluate Brainmox when several recurring tasks need continuing context. It combines searchable memory, schedules, file tools and supported account connections in a managed cloud service. Review the product scope and the actual artifacts linked below. It is a larger commitment than occasional writing assistance, and access is limited to people with member invitations.
For a broader comparison covering individual writing, research and document jobs, use the AI assistants for work guide.
What can you delegate through the working day?
Start with a bounded responsibility that has visible inputs and a checkable output. “Manage my day” leaves priority, authority and success undefined. “Prepare tomorrow’s meeting brief from these calendar events and project notes” gives you something concrete to evaluate.
The following is an illustrative recurring-work schedule. It is not a claim that any product above supports every step without configuration. Set the timezone explicitly and test each job once before making it recurring.
| When and task | Required input and output | Person reviewing |
|---|---|---|
| Weekdays, 8:00 a.m.: morning brief | Read authorized calendar events and the current task list. Return today's commitments, preparation needs and missing information, with source references. | Executive checks priorities, times and omitted commitments. |
| Weekdays, 4:00 p.m.: next-day preparation | Use tomorrow's agenda and selected project notes. Draft a short meeting brief listing open decisions and questions. | Meeting owner checks relevance and confidential details before sharing. |
| Twice weekly: follow-up queue | Use selected email threads and an approved action list. Prepare reply drafts and flag items needing a decision. | Sender checks recipients, dates and commitments, then sends manually. |
| Friday: status report | Read dated project updates. Produce a report and task ledger separating completed work, blockers and unknown status. | Project owner checks source freshness and approves distribution. |
Give each job only the connections and actions it needs. Calendar preparation may need event reading without event editing. Drafting replies needs access to the relevant threads and a place to save drafts. Publishing a report or sending an email adds a separate external action that should be deliberately configured and tested.
In Brainmox, Gmail’s draft-only tool setting blocks sending, but Google’s underlying permission grant is broader. Reading a full message or thread can attempt to mark it read. Review the Gmail setup and demonstration before assuming draft mode leaves the mailbox unchanged.
A copyable morning-brief instruction
Use this as a starting brief, then adapt the source list and permissions to your chosen product. It is an instruction template, not an enforced security boundary.
Prepare my morning brief at 8:00 a.m. America/New_York on weekdays. Use only the calendar, task list and project notes I have explicitly selected for this job. State when each source was last updated where that information is available.
Return four sections: today’s commitments; preparation needed; overdue follow-ups; decisions I need to make. Include the source event, task or note for each item. Preserve stated owners and deadlines. Flag missing owners, conflicting dates and unavailable sources instead of filling them in.
Suggest priorities separately from confirmed commitments. Do not send messages, change calendar events or assign work. Return the brief here for review. If a required source cannot be read, say which source is missing and which parts of the brief may be incomplete.
Pair these instructions with the product’s actual permission settings. For a team spanning US and Canadian timezones, spell out the intended zone for the schedule and any meeting times; “tomorrow morning” is insufficient when the source and reader use different zones.
Inspect an output before trusting a recurring job
Brainmox’s existing demonstrations let you inspect three parts of this work:
- Follow-up ownership: the meeting-notes example includes original and revised CSVs after an owner and deadline clarification. Compare the two versions to see the correction.
- Weekly reporting: the report example includes an actual Word report and CSV ledger created from six fictional updates, alongside the source notes and review findings.
- Email preparation: the Gmail example shows three observed saved drafts, including a corrected-date thread. Its evidence does not establish a complete account-wide no-send audit.
These are individual observed outputs. They do not prove a morning brief will run correctly every day, that memory will retrieve every fact or that a workflow saves a particular number of hours.
For your own evaluation, run the same small job with three variations: a normal input, a corrected deadline and an unavailable source. Keep the outputs. Check whether the correction reaches the final artifact and whether the missing source is disclosed. Then check one scheduled occurrence in the requested timezone. Count missing facts, wrong commitments and corrections needed; do not score only how polished the prose looks. The assistant evaluation scorecard provides a broader review framework.
Is an AI chief of staff different from an AI executive assistant?
“AI chief of staff” often describes broader coordination: synthesizing priorities, tracking decisions and bringing together updates from several projects. For selection purposes, translate that title into specific deliverables. A decision brief should distinguish source facts, unresolved disagreements and suggested next steps. A follow-up tracker should retain who actually accepted responsibility.
The software does not acquire organizational authority because its label includes “chief of staff.” Keep decisions about competing priorities, relationships and commitments with the responsible person. An AI administrative assistant can prepare the material for that judgment; evaluate the work it produces rather than assuming it replaces a human role.
When Brainmox is a fit
Brainmox is worth evaluating if you have recurring work across supported accounts and files, want context to persist between sessions and can review the resulting drafts, reports and task lists. Its managed setup is relevant if you want an assistant without operating a self-hosted agent. If operating the software yourself is a requirement, compare the OpenClaw alternatives.
If the whole requirement is finding time on a calendar, begin with a scheduling tool. If you only need occasional prose edits, consider assistance already available in your existing software. Brainmox’s price and invitation requirement should be part of the decision from the start.
Read what Brainmox includes, check the current price and beta terms and review how member invitations work. Choose one recurring responsibility whose output you can verify before expanding the assistant’s scope.