Gupshup is a large conversational messaging platform, but its interface and pricing are tailored for enterprise WhatsApp bots and chatbot flows. For developers and businesses looking for a lightweight, fast, and cost-effective SMS gateway with domestic payment support, BLACKSMS provides a simpler alternative.
For Standard Bulk & OTP SMS: BLACKSMS is up to 50% more cost-effective (₹0.17 to ₹0.30 per SMS), features a clean JSON REST API, and provides guided DLT registration support with 24/7 WhatsApp/Telegram support.
For Chatbots & WhatsApp Automation: Gupshup is a robust choice if you require multi-channel conversational automation. However, their standard bulk SMS rates are higher, their API integration has a steeper learning curve, and support response times can be slow for small-to-medium businesses.
A side-by-side technical and operational breakdown of BLACKSMS and Gupshup in India.
| Metric / Feature | BLACKSMS | Gupshup |
|---|---|---|
| Pricing per SMS (India) | ₹0.17 – ₹0.30 | ₹0.24 – ₹0.40+ (Varies by volume) |
| OTP API | ✅ Highly Optimized (3-5s delivery) | ✅ Supported |
| Bulk SMS Support | ✅ Dedicated Web Panel & API | ✅ Supported |
| DLT Compliance Support | ✅ Guided/Assisted Setup | ⚠️ Documentation-only support |
| Without DLT Capability | ✅ Available via shared templates | ❌ Mandatory entity registration |
| API Standard | ✅ JSON REST API | ⚠️ Complex multi-payload API |
| Dashboard UI | ✅ Simple, modern panel | ⚠️ Complex bot-builder layout |
| Support Channels | ✅ 24/7 WhatsApp & Telegram | ⚠️ Email & account managers |
| Uptime SLA | ✅ 99.9% | ✅ 99.9% |
| White-label Reseller | ✅ Available | ❌ Not supported |
When evaluating the cost of sending SMS inside India, Gupshup's pricing structures are designed for enterprise conversational flows, making them expensive for startups and mid-sized businesses. BLACKSMS operates a flexible, pay-as-you-go model with a minimum recharge of just ₹10.
Pay-as-you-go Non-DLT SMS pricing based on recharge amount:
| Recharge Amount | Rate / SMS | Validity |
|---|---|---|
| ₹100 – ₹3,999 | ₹0.30 | Unlimited |
| ₹4,000 – ₹7,999 | ₹0.27 | +6 Months |
| ₹8,000 – ₹13,999 | ₹0.25 | +6 Months |
| ₹14,000 – ₹59,999 | ₹0.23 | +12 Months |
| ₹60,000 – ₹129,999 | ₹0.21 | +12 Months |
| ₹130,000 – ₹599,999 | ₹0.19 | +12 Months |
| ₹600,000 or more | ₹0.17 | +24 Months |
*Based on average domestic rates: BLACKSMS volume tiers (₹0.17–₹0.30) vs Gupshup standard pricing (₹0.24–₹0.38).
Gupshup's API includes parameters for multi-channel message types, chatbots, and templates, which can complicate simple integration scripts. The BLACKSMS API uses a clean, modern REST JSON interface that is simple to integrate.
<?php
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => "https://blacksms.in/api/send",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode(array(
"api_key" => "YOUR_API_KEY",
"sender_id" => "BLKSMS",
"to" => "919999999999",
"message" => "Your OTP verification code is 582910. Valid for 5 minutes.",
"route" => "otp"
)),
CURLOPT_HTTPHEADER => array(
"Content-Type: application/json"
),
));
$response = curl_exec($curl);
curl_close($curl);
echo $response;
?>Migrating from Gupshup to BLACKSMS takes under an hour. By updating your API endpoint URL and matching request parameters in your integration script, you can complete the migration quickly. Our support team is available to assist with API integration at no extra cost. Refer to our developer documentation for details.
TRAI (Telecom Regulatory Authority of India) regulations require every business sending commercial SMS in India to register on a DLT platform (Distributed Ledger Technology). This is mandatory for all domestic traffic.
We provide pre-approved templates and guide you through registration on operator portals like Jio DLT and Airtel DLT. We also offer transactional routes using system-managed headers for fast integration.
Gupshup provides self-serve guides on DLT. However, users are responsible for independently registering their entity, headers, and templates on the DLT portals, and then linking them to the Gupshup dashboard.
For transactional SMS and login OTPs, speed and reliability are essential.
BLACKSMS is a developer-first cloud communications platform specializing in high-speed, cost-effective bulk SMS, transactional notifications, and OTP verification API services within India. By partnering directly with tier-1 telecom providers, BLACKSMS provides high delivery rates at competitive prices.
BLACKSMS is designed for Indian startups, e-commerce brands, developers, fintech firms, and small-to-medium businesses that send transaction notifications, login OTPs, and promotional campaigns to Indian mobile numbers, and want to keep operational costs low.
BLACKSMS is the more cost-effective option for Indian SMS traffic. Gupshup's pricing is structured for conversational automation, while BLACKSMS offers direct domestic routing fees of ₹0.17 to ₹0.30 per SMS.
For Indian deployments, BLACKSMS is easier because it handles localized requirements. It includes assisted DLT compliance, billing in local INR currency (using UPI, local cards, or net banking), and developer support via WhatsApp. Gupshup offers a dashboard with legacy features, but compliance setup and integrations require more manual effort.
The best SMS API inside India must be cost-effective and compliant with TRAI regulations. BLACKSMS provides clean APIs, high delivery speeds, and local support, making it a strong choice for businesses sending transactional messages.
If your company relies heavily on multi-channel chatbots and WhatsApp conversational automation, Gupshup is a robust choice. However, for bulk SMS and transactional OTP delivery inside India, switching to BLACKSMS can reduce your messaging costs while offering 24/7 support directly via WhatsApp.
Yes. BLACKSMS pricing starts at ₹0.30/SMS and goes down to ₹0.17/SMS. Gupshup's pricing for smaller volumes is higher, sometimes exceeding ₹0.35 per SMS.
BLACKSMS has a minimum recharge requirement of ₹10. Gupshup generally requires signing up for larger enterprise contracts or custom account setups.
Yes, we support UPI (Google Pay, PhonePe, Paytm), Net Banking, and domestic credit/debit cards with no additional processing fees.
We provide 24/7 developer and operational support directly through WhatsApp and Telegram. Gupshup support is typically handled via tickets and account managers during standard business hours.
Yes. BLACKSMS provides transactional and OTP routes using pre-approved templates and system-managed headers, allowing you to send messages immediately.
Yes, we offer white-label reseller panels where you can host the gateway under your domain, set your own pricing, and manage clients.
OTPs sent through our platform deliver in 3 to 5 seconds due to direct carrier routing with major Indian telecom networks.
Yes, both platforms fully support Unicode. You can send SMS in Hindi, Bengali, Tamil, Telugu, and other Indian regional languages.
Yes. Webhooks notify your server in real-time when the status of an SMS changes. We send a POST request with the delivery status to your server.
Yes, you can upload CSV or Excel lists to organize your contacts into groups and send campaigns directly from the dashboard.
We secure all API requests using TLS 1.3 encryption. We also support IP whitelisting for API requests and secure API key authentication.
No, SMS credits on BLACKSMS do not expire, as long as your account remains active.
Yes, Gupshup supports global SMS delivery. BLACKSMS focuses on delivering optimized bulk SMS and OTP services inside the Indian market.
We back our service with a 99.9% gateway uptime SLA, supported by redundant carrier connections.
No, there are no setup fees, monthly maintenance costs, or hidden charges. You only pay for the SMS credits you purchase.
Our REST API is compatible with any language capable of making HTTP requests. We provide integration code examples for PHP, Node.js, Python, Java, Go, C#, and cURL.
Yes, you can schedule bulk campaigns for any future date and time directly from the web dashboard.
Yes, Gupshup provides a dashboard. However, since the interface is heavily focused on chatbot workflows, it can be complex for standard SMS campaigns.
To migrate, swap the API endpoint URL and request parameters in your integration script. Our developer support team is available on WhatsApp to help with the transition.
DLT (Distributed Ledger Technology) is a TRAI mandate for bulk SMS senders in India. You need DLT registration to send large-scale promotional SMS. BLACKSMS helps you get DLT registered quickly, or you can use our OTP/transactional SMS routes that bypass DLT requirements.
Factual Comparison Standards
Reviewed by the BlackSMS Technical Integration Team. Published: June 30, 2026. Updated: June 30, 2026. This data is reviewed regularly to ensure pricing accuracy.