Sandbox Testing Platform for Email, SMS, Webhooks & 2FA
Zunoy Sandbox is a sandbox testing platform for developers and QA teams to test email, SMS, webhooks, OTP, and 2FA workflows without sending test data to real users or production systems. Point your application to Zunoy Sandbox during development, then inspect, debug, and validate every event in one place.
TL;DR
What is Zunoy Sandbox?
Zunoy Sandbox is a testing platform that captures every email, SMS, webhook and OTP your app sends, so developers and QA teams can test them without reaching real users or production systems.
Key takeaways
One tool replaces a separate email catcher, SMS simulator, webhook inspector and shared authenticator phone.
Connect by swapping one endpoint: SMTP host, SMS endpoint or webhook URL. No code rewrite.
Your whole team sees every event live, with alerts in Slack, Discord, Microsoft Teams or Telegram.
Free forever plan with 100 operations a month and unlimited team members. Paid plans from $5/month, billed annually.
DEVELOPER WORKFLOW
How Does Zunoy Sandbox Work?
- 01
Point your app
Swap your SMTP, SMS, or webhook endpoint with your Zunoy Sandbox credentials.
- 02
Trigger your flows
Run signups, OTPs, alerts, or any notification your app sends.
- 03
Inspect everything
View full email HTML, SMS content, webhook payloads in real time.
- 04
Debug & Iterate
Analyze logs, retry events, and fix issues during sandbox testing before going live.
THE PROBLEM
Why Use One Sandbox Testing Platform Instead of Multiple Developer Testing Tools?
You need to verify that welcome email lands, the SMS OTP arrives, the webhook fires, and 2FA works—all before production.But your current setup scatters test data across Mailtrap, an SMS simulator, ngrok, and Google Authenticator. It's slow, error-prone, and impossible to automate.
- EMAIL TESTING TOOL
The Staging Leak
Your password reset email just went to 10,000 real users during a staging test. One of them replied.
- WEBHOOK TESTING TOOL
The Silent Failure
Your webhook fired, but nobody knows if the payload was even correct — until a customer complains.
- SMS TESTING TOOL
The Credit Burn
Your team burned through $40 in SMS credits last sprint. Testing. In staging. None of it reached a real user.
- MFA / TOTP
The Shared Phone
QA is testing your OTP flow using a team member's phone. Two testers. One code. One of them is waiting.
These aren't edge cases. They're Tuesday morning. Zunoy Sandbox was built for exactly this kind of sandbox testing.
TESTING CAPABILITIES
What Can You Test With Zunoy Developer Sandbox?
Most developer testing tools stop at email testing. Zunoy Sandbox lets you test email, SMS, webhooks, and OTP/2FA flows together — in a single developer sandbox your whole team can use.
Email Testing Tool
Use the email testing tool to capture and inspect every email sent from your app. View HTML, raw headers, attachments, spam score, and delivery metadata — all in one place.
SMS Testing Tool
Use the SMS testing tool to test every OTP and transactional SMS without spending a rupee on real delivery. REST API, Sender ID, SMS templates — all are included.
Webhook Testing Tool
Use the webhook testing tool to get a unique URL. Point any service at it. Every payload arrives in real time — inspectable, replayable, organised by project.
Shared MFA/TOTP Inbox
Test multi-factor authentication without using a real device. Upload QR codes or secrets and share TOTP(time-based one-time password) access across your QA team. No authenticator app required.
Ready for sandbox testing?
Start your free developer sandbox in under 5 minutes.
No Credit Card required
Free Forever
One Single Tool for - Email + SMS + Webhook + TOTP
Maintain customer trust - Test Alerts before your Users do
Setup under 5 minutes
Real human support by Zunoy Team
GLOBAL FEED
What is the Zunoy Sandbox live activity feed?
A single real-time timeline of every email, SMS, webhook and OTP your app sends, shared across your team.
Real-time events, zero refresh
Isolated per account — fully private
Filter by Email, SMS, Webhook, OTP
Slack
Discord
Webhooks
Microsoft Teams
ALERTS
Can I get Sandbox alerts in Slack, Discord or Microsoft Teams?
Connect your Zunoy Sandbox inbox to Slack, Discord, or Microsoft Teams and get instant notifications the moment an email, SMS, webhook, or OTP arrives — no need to keep a browser tab open. Perfect for real-time visibility during active sandbox testing.
LOW ON INDUSTRY PRICING
How much does Zunoy Sandbox cost?
How many operations do you plan to test?
100 Operations
Growth
$14.17
/Month
For growing workloads with top-up support.
Business
$40.83
/Month
Business tier.
*Prices are exclusive of local taxes.
THE ALTERNATIVE
How does Zunoy Sandbox compare with Mailtrap, MailHog and Mailosaur?
Zunoy Sandbox is built as a modern developer sandbox alternative. Compare features, pricing, and workflows to see why teams are switching.
Zunoy Sandbox
Everything you need in one predictable plan. No add-ons, no hidden costs, and no surprises as your team scales.
VS
Why the Difference
Most developer testing tools charge per monitor, per seat, or per feature. As your sandbox testing needs grow, so do your costs. Zunoy offers a simple flat-rate plan that includes everything your team needs from day one.
VS
Mailtrap
Email-only · Paid team features
Mail Hog
Email only · No Team Features
Mailsaur
No Webhook and TOTP
FAQS
Zunoy Sandbox FAQs: email, SMS, webhook and 2FA testing
What is Zunoy Sandbox?
Zunoy Sandbox is a developer-first sandbox testing platform that lets you safely test Email, SMS, Webhooks, and TOTP/MFA flows without touching production or reaching real users. Every message your app sends lands in an inspectable developer sandbox instead.
Can I test email and SMS without sending messages to real users?
Yes. Zunoy Sandbox provides an email testing tool and SMS testing tool that capture test messages inside the sandbox instead of delivering them to real inboxes or phone numbers. Developers can inspect email content, SMS messages, OTPs, and related test events without affecting real users or production services.
Can I test webhooks with Zunoy Sandbox?
Yes. Zunoy Sandbox includes a webhook testing tool for creating inbound endpoints and inspecting webhook requests and payloads during development. You can use it to test webhook integrations with services such as Discord, Telegram, Microsoft Teams, and custom JSON endpoints without relying on production systems.
Can I test OTP and 2FA authentication flows in a sandbox?
Yes. Zunoy Sandbox supports MFA testing through its TOTP sandbox. Developers can provide a Base32 secret or seed to generate time-based authentication codes and use them to test OTP and 2FA workflows without requiring a physical authenticator.
Do I need to change my existing provider or SDK to use Zunoy Sandbox?
No. Zunoy Sandbox is designed to work with your existing development setup. You can point your SMTP client, SMS SDK, or webhook URL to the appropriate Sandbox endpoint without changing your production provider or rewriting your application logic.
BUILT BY DEVELOPERS. FOR DEVELOPERS.
Who uses Zunoy Sandbox?
Used by startups, SaaS companies, and QA teams to safely test email and webhook workflows before production.
AI OPINION
Get a Second opinion from an AI Tool
ChatGPT, Claude, Gemini or Perplexity for an honest take. They'll tell you what makes Zunoy Sandbox stands out for email and other testing modules
