Human-led. Harbor-supported.
Know which clients are slipping
before they go quiet.
Harbor flags the client relationships going quiet and keeps Account Activity current with relevant personnel and market changes — history that lives with the agency, not one person's memory.
Harbor chart dashboard showing client relationships as vessels drifting between Harbor and open water, with an attention queue, six-week wake trails, and a selected-client detail panel.
Our team understands high-stakes client relationships through work with
One clear view of every client relationship.
Relationship flags, Account Activity, and shared client context stay connected — without another system for your team to maintain.
It reads the flags you'd never track by hand
Harbor watches four relationship patterns across your client channels — quietly, from metadata, every day. Nothing to log.
Get early accessFlag detection
Updated just now
Harbor keeps this current automatically
No manual updates. No relationship context lost between handovers.
Relationship context from the tools your clients already use.
Four flags that move before a relationship breaks.
Harbor reads what is already happening in Slack and Gmail, then makes subtle relationship change visible without asking your team to log a thing.
Harbor learns each stakeholder's normal cadence, then watches for drift. A partner who used to reply same-day now taking a week is a stronger churn flag than any raw number — because it's relative to how that relationship actually behaves.
“Replies that used to take 4 hours now take 11 days.”
- Compared with each relationship's own normal cadence
- Measured per stakeholder, not as one account-wide average
- Surfaces sustained drift before the renewal conversation
Active flag · 01
Response latency
Per-stakeholder reply times, measured against a rolling 28-day baseline for each relationship.
The same client. Two trajectories.
Caught early, a quiet relationship becomes an invested partnership. Missed, it fades from slowing replies to a lost renewal.
One churned £15k/mo client = £180k of lost annual revenue.
Everything your team needs to see relationship change clearly.
Nobody's head is the database.
Client history that belongs to the agency, not the account manager.
Right now, your most valuable client context lives in one person's memory — which threads went cold, what was promised in March, why the CEO went quiet. When they're on holiday, it's unavailable. When they leave, it's gone. Harbor keeps the record itself: every signal, every brief, every shift in the relationship, in one place anyone on the account can reach. The knowledge stops being someone's property and becomes the agency's asset.
- Jan 2024Note
Kicked off retail rebrand
Scope, timeline and £15k/mo retainer agreed with their CMO.
- May 2024Gmail
Expanded into campaign work
Added paid social after the launch outperformed targets.
- Sep 2024Slack
Escalation, then resolved
Missed a deadline; recovered trust with a revised delivery plan.
- Feb 2025Flag
Their CEO went quiet
Sponsor stopped weighing in — Harbor flagged it week one.
- Apr 2025Gmail
Renewal conversation opened
Re-engaged the sponsor early, ahead of the contract date.
Handover used to mean a doc written from memory the week someone left. Now it means sending a link.
The full flag timeline
Past briefs for that client
The stakeholder map
Its channel mappings
Priced per user. Built for agencies.
Start free on one client, or bring your whole client book. No credit card to try Harbor in early access.
Early access is free. These are the prices founding agencies will lock in at a discount when billing begins.
Free
1 user · 1 client
Continuous Account Activity for your single most important client. Best for trying Harbor with one account before you scale up.
Get early accessSolo
Up to 5 clients
For fractional client leads and small studios with a client book they can't afford to lose.
Get early accessAgency
Min 3 users · Unlimited clients
For 20–100 person agencies with retainer clients. Account Activity history, audit log, and per-user access controls.
Get early accessEnterprise — SSO, audit API, MCP, dedicated support — from £150/user/mo. Get early access
Today, continuous Account Activity. Over time, the relationship layer for every agency.
What ships today is the wedge — a continuously updated view of client relationships and relevant company change. Here's what's on the roadmap. None of it is available yet; we're building it deliberately, one earned feature at a time.
Live dashboard + chat assistant
In development
An always-on relationship dashboard. Ask Harbor in plain English — “which clients should I prioritise this week?” — and get answers grounded in your data.
MCP access for AI agents
Planned
Connect Harbor to your AI tools. Your Claude, Cursor, or in-house assistant can query relationship flags directly — the data layer for AI-first agencies.
Multi-source intelligence
On the horizon
Beyond Slack and Gmail — meeting transcripts, project tools, analytics signals. The full relationship picture in one feed.
Start watching your first account.
Be one of the first agencies on Harbor. Connect Slack and Gmail, add your client accounts, and Harbor keeps their activity current.
Frequently
asked questions
What does Harbor actually read?
Harbor connects to the Slack channels and Gmail threads you authorize and reads relationship metadata — reply timing, message frequency, and who's active. Message text is used only for sentiment, then purged. It never stores the words themselves.
Do I have to log anything or update a CRM?
No. Harbor reads what's already happening in Slack and Gmail, then keeps Account Activity current automatically. There's nothing to enter, nothing to migrate, and no weekly admin.
What appears in Account Activity?
Account Activity continuously brings together relevant changes around each client company — including personnel moves and market developments — with the relationship flags Harbor already tracks.
Does it work with Gmail?
Yes. Slack and Gmail are both available now, using the same relationship flags across opted-in client channels and authorized email threads.
Is my clients' data safe?
Yes. Per-channel opt-in, message bodies purged after sentiment analysis (configurable down to 7 days), OAuth tokens encrypted at rest with AES-256-GCM, and a full audit trail of everything Harbor computes and sends.
How is this different from a CRM?
A CRM needs manual updates and tracks deals. Harbor needs zero data entry and tracks relationship health — the communication flags a CRM simply can't see.
Who can see a Client Context Page?
Context pages are shared with your team, scoped by your access controls — the record is the agency's, visibility is yours to set.
What's on a Client Context Page?
The flag timeline for that relationship, its Account Activity history, the stakeholder activity map, and which channels Harbor watches. It's read-only and updates automatically — nothing to maintain.
How long does setup take?
A few minutes: connect Slack and Gmail, choose the client channels and email sources Harbor should watch, and add your client accounts. Harbor then starts keeping their activity current.
What does it cost?
Harbor is in early access right now. Join the list and we'll share pricing along with your invite.