Sandbox Testing for Email, SMS, Webhooks & 2FA Codes Without Touching Production
Point your app at Zunoy Sandbox during development. Every email, SMS, OTP, and webhook lands here — ready to inspect, debug, and validate. Safe sandbox testing with no surprises or real users involved.
THE PROBLEM
Juggling four developer testing tools just to test a signup flow?
We've been there.
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.
The Staging Leak
Your password reset email just went to 10,000 real users during a staging test. One of them replied.
The Silent Failure
Your webhook fired, but nobody knows if the payload was even correct — until a customer complains.
The Credit Burn
Your team burned through $40 in SMS credits last sprint. Testing. In staging. None of it reached a real user.
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.
HOW IT WORKS
Sandbox testing up and running in four easy steps
Point your app
Swap your SMTP, SMS, or webhook endpoint with your Zunoy Sandbox credentials.
Trigger your flows
Run signups, OTPs, alerts, or any notification your app sends.
Inspect everything
View full email HTML, SMS content, webhook payloads in real time.
Debug & Iterate
Analyze logs, retry events, and fix issues during sandbox testing before going live.
WHAT ZUNOY SANDBOX COVERS
One developer sandbox. Every notification channel covered
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 access across your QA team. No authenticator app required.
Ready for sandbox testing?
Start your free developer sandbox in under 60 seconds.
200 Free AI Credits
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
Live sandbox testing activity across the Sandbox. One timeline for everything your app sends.
Every email caught, every webhook received, every OTP generated — in real time. Your entire team sees the same feed, simultaneously.
Real-time events, zero refresh
Isolated per account — fully private
Filter by Email, SMS, Webhook, OTP
Slack
Discord
Webhooks
Microsoft Teams
ALERTS
Know the moment something lands — without watching the inbox
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
Pricing that scales with your sandbox testing, not your mistakes
How many operations do you plan to test?
100 Operations
Free
$0
/Month
100 Operations / Month
0 AI Credits
2 Active Inboxes
5 Email Forwardings
Email Analysis: HTML Check & Link Check
2 SMS Inboxes
2 Webhook Apps
5 TOTP / MFA Profiles
Up to 3 Team Members
1 Workspace
Starter
$5
/Month
2,000 Operations / Month
10 AI Credits
5 Active Inboxes
25 Email Forwardings
Email Analysis: Everything from Free + Spam Analysis
5 SMS Inboxes
5 Webhook Apps
10 TOTP / MFA Profiles
Up to 5 Team Members
3 Workspaces
Growth
$14.17
/Month
Business
$40.83
/Month
60,000 Operations / Month
200 AI Credits
50 Active Inboxes
250 Email Forwardings
Email Analysis: Everything from Starter + Performance Score
50 SMS Inboxes
10 Webhook Apps
50 TOTP / MFA Profiles
Up to 50 Team Members
10 Workspaces
Free
$0
/Month
Enjoy essential features at no cost, forever.
100 Operations / Month
0 AI Credits
2 Active Inboxes
5 Email Forwardings
Email Analysis: HTML Check & Link Check
2 SMS Inboxes
2 Webhook Apps
5 TOTP / MFA Profiles
Up to 3 Team Members
1 Workspace
Starter
$5
/Month
Starter tier for basic workloads.
2,000 Operations / Month
10 AI Credits
5 Active Inboxes
25 Email Forwardings
Email Analysis: Everything from Free + Spam Analysis
5 SMS Inboxes
5 Webhook Apps
10 TOTP / MFA Profiles
Up to 5 Team Members
3 Workspaces
Growth
Best Value$14.17
/Month
For growing workloads with top-up support.
20,000 Operations / Month
50 AI Credits
10 Active Inboxes
100 Email Forwardings
Email Analysis: Everything from Starter + Performance Score
10 SMS Inboxes
10 Webhook Apps
20 TOTP / MFA Profiles
Up to 20 Team Members
5 Workspaces
Business
$40.83
/Month
Business tier.
60,000 Operations / Month
200 AI Credits
50 Active Inboxes
250 Email Forwardings
Email Analysis: Everything from Starter + Performance Score
50 SMS Inboxes
10 Webhook Apps
50 TOTP / MFA Profiles
Up to 50 Team Members
10 Workspaces
*Prices are exclusive of local taxes.
THE ALTERNATIVE
Switching from Mailtrap, Mailhog, or 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
The things developers actually ask.
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.
Does Sandbox actually deliver emails or SMS to real people?
No. Nothing sent during sandbox testing reaches a real inbox, phone number, or webhook consumer. Messages are captured and shown in your dashboard for inspection — safe for development, staging, and CI.
Can I test webhook integrations too?
Yes. The webhook testing tool in Zunoy Sandbox lets you create apps with multiple inbound endpoints, with built-in support for Discord, Telegram, and Microsoft Teams, plus Generic endpoints for any custom JSON payload.
How do I test 2FA/OTP flows without a physical authenticator?
The MFA TOTP Sandbox acts as a virtual authenticator — give it a Base32 secret or seed and it generates valid time-based codes every 30/60 seconds, so you can automate MFA testing in CI/CD.
Do I need to change my provider or SDK to use Sandbox?
No. Point your existing SMTP client, SMS SDK, or webhook URL at your Zunoy Sandbox endpoint — no provider setup, carrier registration, or code rewrites required.
BUILT BY DEVELOPERS. FOR DEVELOPERS.
Trusted by Modern Engineering Teams
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
Ask ChatGPT, Claude, Gemini or Perplexity for an honest take. They'll tell you what makes Zunoy Sandbox stands out in Email an other Module Testing
Sandbox
Test Email, SMS, Webhooks & 2FA codes without touching production.
Operational
Mail Us
support@zunoy.com
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