Sublay tech stack

Backend and SDKs for social features — posts, comments, votes, follows, chat and notifications. Formerly Replyke.

sublay.io ↗Checked Sep 2026

Foundation

Transactional Email

Postmark

“Postmark makes sending event-based emails EXTREMELY easy.” — the maker, Sep 2026 ↗

Resend

“Simple API, excellent deliverability, and a great developer experience out of the box.” — the maker, Sep 2026 ↗

On its website: DNS: resend._domainkey.sublay.io TXT (record present); DNS: send.sublay.io MX feedback-smtp.us-east-1.amazonses.com source · Oct 2026 ↗

In its subprocessor list: Resend | Resend Inc. | United States | Transactional email delivery — used to send notifications and system emails where end-user email addresses are involved. source · Oct 2026 ↗

Database

Supabase

“Managed Postgres with a great DX, built-in connection pooling, and easy scaling.” — the maker, Sep 2026 ↗

In its subprocessor list: Supabase | Supabase, Inc. | United States | Primary database and file storage infrastructure — stores all customer personal data. source · Oct 2026 ↗

Frontend Framework

Next.js

“Used Next for all user facing pages, including landing page, blog and docs (Nextra)” — the maker, Sep 2026 ↗

On its website: HTTP: sublay.io responds with x-nextjs-prerender; HTTP: www.sublay.io responds with x-nextjs-prerender source · Oct 2026 ↗

Money

Payments

Polar

“Clean API, developer-first billing, and great open-source alignment with our own values.” — the maker, Sep 2026 ↗

Shipping

Hosting

Railway

“Super easy to work - though I wish the logs would be easier to select and copy.” — the maker, Sep 2026 ↗

In its subprocessor list: Railway | Railway Corp. | United States | Server hosting and managed Redis cache — all API requests carrying customer data are processed within Railway's infrastructure. source · Oct 2026 ↗

Growth

Product Analytics

PostHog

“Open-source, self-hostable, and product analytics + session replay in one tool.” — the maker, Sep 2026 ↗

Other tools

Other

Vercel

On its website: HTTP: sublay.io responds with x-vercel-id; HTTP: www.sublay.io responds with x-vercel-id source · Oct 2026 ↗

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