Privacy Policy
This Privacy Policy explains how SellLync ("SellLync", "we", "us"), a product of StreamLync, collects, uses, shares and protects information when you use our website sell.streamlync.tech, our dashboard and our related services (the "Service"). SellLync helps online sellers manage orders, inventory, courier bookings, customer messages and notifications.
1. Who this policy covers
- Sellers — businesses and people who create a SellLync account ("you").
- Sellers' customers — people who buy from, message or comment on a seller's Facebook Page or Instagram account. For this information the seller decides why and how it is used; SellLync processes it on the seller's behalf to provide the Service.
2. Information we collect
- Account information: your name, shop name, mobile number, email address and password (stored only as a secure hash).
- Store data you enter: products, prices, stock, orders, customer names, phone numbers and delivery addresses, and courier booking details.
- Facebook and Instagram data (only after you connect your Page): through Meta's official APIs we receive messages sent to your Page or Instagram account, the sender's public name and page-scoped ID, comments on your posts, the commenter's name or username, and your Page and Instagram account IDs. We store the Page Access Token you provide so the Service can read and reply to these messages on your behalf.
- Courier and SMS data: the API keys you provide for courier services (for example Steadfast), and the phone numbers and texts of SMS notifications sent from your account.
- Payment data: when you recharge your wallet, payment is processed by SSLCommerz. We receive the transaction ID, amount, status and payment method type. We never receive or store your card number, PIN or mobile-banking password.
- Technical data: IP address, browser type and request logs kept for security, fraud prevention and troubleshooting.
3. How we use information
- To provide the Service: show your inbox and leads, send replies and automatic replies you configure, manage orders and stock, book couriers and send order SMS to your customers.
- To calculate return risk for a customer phone number using your own order history.
- To process wallet recharges, charge for SMS and other paid features, and keep accurate records.
- To secure the Service, prevent fraud and abuse, and respond to support requests.
- To send you important notices about your account and the Service.
We do not sell personal information, we do not use Facebook or Instagram data for advertising, and we do not use it for any purpose other than providing the features you turn on.
4. Facebook and Instagram (Meta Platform) data
- We access Meta data only with the permissions you grant when connecting your Page, and only to provide the inbox, auto-reply, comment auto-reply and lead features.
- We do not share Meta data with third parties except our hosting provider, and only as needed to run the Service.
- You can disconnect at any time by removing the SellLync app in your Facebook settings (Settings & privacy → Settings → Business integrations) or by asking us to delete your data (see Data Deletion).
- Our use of information received from Meta APIs follows the Meta Platform Terms.
5. Who we share information with
We share information only with service providers that help us run SellLync, and only what each needs:
- Meta (Facebook/Instagram) — to send your replies to your customers.
- Courier companies you connect (e.g. Steadfast) — customer name, phone, address and cash-on-delivery amount for bookings you make.
- SMS provider — customer phone number and message text for SMS you send.
- SSLCommerz — to process wallet payments.
- Hosting provider — our servers and database.
We may also disclose information if required by Bangladeshi law or a valid legal request.
6. Data retention
We keep your data while your account is active. Messages and comment logs are kept so you can see your history. When you delete your account or ask us to delete your data, we delete it within 30 days, except records we must keep for legal, tax or accounting reasons (such as payment records), which are kept only as long as required.
7. Security
We use HTTPS encryption, hashed passwords, per-shop data separation, signature checks on Meta webhooks, payment verification with SSLCommerz, access limits and rate limiting. No system is perfectly secure, so please keep your password and API keys private.
8. Your choices and rights
- View and update your store data and settings in the dashboard.
- Turn auto-replies, comment auto-reply and SMS on or off at any time.
- Disconnect your Facebook Page or courier accounts.
- Ask us for a copy of your data, a correction, or deletion by emailing hello@streamlync.tech.
If you are a seller's customer and want your information removed, please contact that seller; you may also contact us and we will help.
9. Cookies and local storage
The dashboard stores your login session in your browser's local storage so you stay signed in. We do not use advertising or tracking cookies.
10. Children
SellLync is a business tool and is not intended for anyone under 18.
11. Changes to this policy
We may update this policy. We will change the "Last updated" date and, for important changes, notify sellers by email or in the dashboard.
12. Contact us
StreamLync (operated by Airnet Communications)
Level 7, Dhanmondi 27, Dhaka, Bangladesh · #335 Sylhet Road, Moulvibazar, Bangladesh
Email: hello@streamlync.tech · Support: support@streamlync.tech · Phone: +880 9696 346803