One portal for every client, project, and invoice.
Cyntheion Portal gives your agency a single, branded home for projects, milestones, messaging, deliverables and invoicing — so clients stop emailing you for status updates and start finding answers themselves.
Built for agencies at every stage
Running client work shouldn't feel like herding five different tools.
Most agencies stitch together email, spreadsheets, a project tool and an invoicing app — and clients still don't know what's going on.
"Just checking in" emails
Clients email you for status updates because they have no other way to see what's happening on their project.
Scattered spreadsheets and folders
Scope, invoices, deliverables and sign-offs live in five different tools that never quite agree with each other.
No single source of truth
When a client asks "where are we on X," the honest answer is a PM digging through Slack, email and a spreadsheet.
How it works
Three steps from signup to your first client logging in.
Set up your organization
Create your agency workspace, invite your team, and add your first client company in minutes.
Bring projects into one place
Add projects, milestones and tasks, connect your invoicing, and give each client their own branded login.
Let the portal do the updates
Clients see live progress, approve deliverables, and pay invoices — without another status-update email.
Everything client work needs, nothing it doesn't
Built specifically for agencies managing multiple clients — not a generic project tool stretched to fit.
Everyone sees the same plan
Projects, milestones & tasks
Break work into phases, milestones and tasks your clients can actually follow — no more explaining status on a call.
Get paid without leaving the portal
Client invoicing built in
Raise invoices against a project and let clients pay directly — funds settle straight to your own Stripe account.
One thread, not six inboxes
Project messaging
Keep every project conversation attached to the work it's about, instead of buried in email or Slack DMs.
Approvals with a paper trail
Deliverables & sign-off
Clients review and formally sign off on deliverables and scope changes — no more "I thought that was included."
Save hours of manual chasing
Reminders & reports
Automated reminders and one-click PDF progress reports keep clients informed without a PM lifting a finger.
Looks like your agency, not ours
Your own branded portal
Every client logs into a workspace scoped to your organization — their data, your brand, fully isolated per agency.
Agencies run leaner with Cyntheion Portal
“We cut our weekly status-update calls from three hours to almost zero. Clients just check the portal now.”
5+ hrs saved per week
Sarah Chen
Operations Lead, Northline Studio
“Invoicing used to be the thing everyone forgot about until it was overdue. Now clients pay from the same place they see their project.”
40% faster invoice payment
Marcus Bello
Founder, Beacon Digital
“Deliverable sign-off used to be a scroll through email threads. Now it's one click, with a record we can point back to.”
Zero scope-creep disputes since switching
Priya Nair
Client Services Director, Fieldstone Creative
Simple pricing that scales with your agency
Every plan includes the full portal — projects, invoicing, messaging and deliverables. Higher tiers raise your seat, client and storage limits.
Free trial
Try the full portal for 14 days
- 3 staff seats
- 3 client companies
- 1 GB storage
- 30-day audit log
Starter
For agencies onboarding their first few clients
- 5 staff seats
- 25 client companies
- 25 GB storage
- 90-day audit log
Pro
For growing agencies running client work at scale
- 15 staff seats
- 100 client companies
- 100 GB storage
- Custom domain & white-label
- 1-year audit log
Scale
For large or multi-brand agencies with custom needs
- Unlimited staff seats
- Unlimited client companies
- Custom storage
- Custom domain & white-label
- Custom audit retention
Frequently asked questions
Give your clients one place to look, instead of five.
Start your free 14-day trial — no credit card required, live in under 10 minutes.