Users, synced
Connect your sign-up flow to the API and every new account appears in your CRM with its source.

Kylosys is the back office every project plugs into: user accounts that land in your CRM, a support inbox and helpdesk, toll-free calls and texts, and Stripe-powered billing. Set it up once, then reuse it for every launch.
Kylosys is the back office every project plugs into: users in your CRM, a support inbox and helpdesk, toll-free calls and texts, and Stripe-powered billing.
Two ways in
Kylosys is a suite of business tools called modules. Owners use it as their whole back office. Developers and creators plug it into the apps, courses and client sites they ship.
Your phone, inbox, customers, tickets, bookings and invoices in one friendly app, set up in an afternoon with no IT person.
Phone, inbox, customers, tickets, bookings and invoices in one friendly app.
Stop rebuilding accounts, billing and support for every launch. Connect Kylosys once and every new project ships with a back office.
Stop rebuilding accounts, billing and support for every launch.
For developers & creators
Every app, course or client site needs the same plumbing: accounts, billing, support and a way to get in touch. Kylosys is that plumbing, so you can spend your time on the part people actually came for.
Connect your sign-up flow to the API and every new account appears in your CRM with its source.
Forward support@ to your own Kylosys inbox address. Every message becomes a conversation your team can answer.
Turn messages into tickets with reply timers, and publish answers in a help centre on your domain.
Buy a toll-free number inside Kylosys and start taking calls and texts right away.
Subscriptions, invoices and payments run through Stripe, straight into your own account.
// 1. When someone signs up to your app
await kylosys.contacts.create({
email: user.email,
name: user.name,
source: "signup", // in your CRM instantly
});
// 2. React to what happens next
kylosys.on("invoice.paid", unlockCourse);
// 1. Give the workspace its inbox address
const inbox = await kylosys.inboxes.create({
name: "yourapp",
});
// → yourapp@inbox.kylosys.com
// 2. Point your domain's support alias at it
[email protected] → yourapp@inbox.kylosys.com
// every forwarded email becomes a thread Kylosys keeps
// 1. Say where events should land
await kylosys.webhooks.create({
url: "https://api.yourapp.com/kylosys",
events: ["contact.created", "invoice.paid"],
});
// 2. Verify the signature header, then react
const event = kylosys.webhooks.verify(req, secret);
if (event.type === "invoice.paid") unlockCourse(event);
Your account
The code above shows the idea, not the exact API. Use the published API reference for real method names.
Independent or together
Switch off anything you don’t need and it simply leaves your sidebar. Nothing is deleted. Keep modules on, and they share one customer record so work flows from one to the next.
Modules
Choose what shows up in this workspace.
+ 12 more · Hiding a module never deletes anything.
Signed up Tuesday · Plan $49/mo · Owner: Alex
Priya writes to support@. The ticket already knows her plan and history.
Her name, plan and open ticket pop up before you answer.
One record, every module. A caller in Phone is the same person as the contact in CRM, the requester on a ticket and the name on an invoice, so nobody types anything twice.
The modules
From a business phone system to Stripe-powered payments, every module is a complete tool on its own page, and every one is included in the suite.
Inside the app
Every module lives in one sidebar and works the same way: a list, filters, and a panel that opens the record without losing your place.
Pricing
Every plan starts with phone, inbox, CRM and projects. Add the rest as you grow. 14-day free trial, no credit card.
$19 per user / month
For solo pros and tiny teams getting organised.
Start free$35 per user / month
For small teams who share customers.
Start free$55 per user / month
For growing teams that need more control.
Start freeQuestions
Still curious? A real person picks up the phone, and the help centre has step-by-step guides for every module.
14 days free. No credit card. Use one module or all 18.