标签：#sms

Instacart redesigned its personalized marketing system using a configuration-driven multi-tenant architecture on Storefront Pro. The system replaces retailer-specific implementations with a shared execution engine, enabling scalable personalization, faster configuration propagation in under a minute, and 99.9% delivery success across hundreds of retail banners through a unified campaign platform. By Leela Kumili

We’re a tiny team of 2–9 engineers who believe business messaging should be simple, reliable, and accessible to everyone. Today we’re officially opening up BulkSMSOnline to the Dev.to community, and we’d love your feedback. What’s BulkSMSOnline? A global bulk SMS platform that lets you send campaigns, alerts, OTPs, and notifications via: A clean web portal A REST API An HTTP API It’s designed for developers who want reliable global delivery without fighting arcane telecom protocols or opaque pricing. Why We Built It We noticed a pattern: most SMS platforms either overcomplicate things with bloated SDKs or hide behind enterprise gatekeepers that don’t listen. We wanted something different a lean, transparent API backed by real people who actually care about your deliverability. So we built BulkSMSOnline around three principles: Reliability : Messages must arrive, every time. Radical simplicity : A clean API you can integrate in minutes. Transparency : Honest pricing, clear limits, no surprises. Quick Start: Send an SMS in Under 5 Minutes Here’s how simple it is with our REST API. For full docs, check out our developer portal . curl -X POST https://api.bulksmsonline.com/v1/sms \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "to": "+1234567890", "message": "Hello from BulkSMSOnline!", "sender": "MyApp" }' You’ll get a JSON response with a message ID and status. That’s it. No multi-page setup or carrier negotiations. What else can you do? Send bulk messages with a single API call Track delivery in real time via webhooks Pull reports programmatically Use our HTTP API for legacy systems Who’s Behind This? We’re a small, agile team (2–9 people). That means: No bureaucracy: Fixes and features ship fast. Direct access: When you email support, you reach the engineers who built the platform. Your feedback shapes our roadmap: Many of our recent features came from developer conversations. Tech stack we love: Python, Node.js, PostgreSQL, an

We run Quackr, a virtual phone number platform that lets developers and individuals receive SMS verifications without exposing a real number. We just published our first inventory transparency report and the data was surprising enough that we thought the dev community would find it useful. The Numbers Right now, 97.6% of our entire virtual phone number inventory is actively rented. 66,214 out of 67,815 numbers assigned and in use across 15+ countries. Over 1,000 numbers available at any given moment but they move fast. That utilisation rate tells you something about how the market has shifted. Virtual numbers are no longer a niche throwaway tool. Developers, businesses, and privacy-conscious users are holding them long term. What Developers Actually Use Virtual Numbers For The obvious use case is SMS verification during testing. Spin up a number, verify an account in staging, move on. But that is not what drives the bulk of demand on our platform. The real volume comes from: Multi-account management — developers and businesses running multiple instances of platforms that require unique phone verification per account. Privacy layers in production apps — applications that need to verify users without collecting their real numbers. A virtual number sits between the user and the platform. Automated verification pipelines — this is where our API and MCP Server come in. If you need to provision numbers programmatically and retrieve OTPs without manual intervention, this is the use case we built for. Geographic flexibility — needing a UK number from Australia, a US number from Ukraine, or any combination that your real SIM cannot provide. The OTP Blocking Problem Something worth knowing if you are building anything that involves SMS verification: platform-level VoIP blocking has become significantly more aggressive over the past two years. WhatsApp, Telegram, Google, and TikTok all run detection on incoming verification requests. A VoIP number gets flagged and the OTP simp