Best SMS API Providers in the UK - Page 2
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Compare the Top SMS API Providers in the UK as of September 2026 - Page 2
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1
Textbelt
Textbelt
Textbelt is a no-nonsense SMS API built for developers who just want to send SMS. Thousands of customers prefer Textbelt over other SMS providers for our ease of setup, simple, predictable pricing packages, and personal support. No recurring billing, unnecessary add-ons, or client libraries. Send 1 free text per day. Create your own key to send more messages afterward. Textbelt offers open-source and paid versions. An SMS provider you can trust. Textbelt has worked with thousands of developers and businesses since 2012. Delivery statuses are not standardized between mobile carriers. For example, some carriers will report SMS as "delivered" when they attempt transmission to the handset while other carriers actually report delivery receipts from the handsets. Textbelt lets you receive replies after you've sent an SMS. Replies are sent by webhook, meaning you will have to set up an HTTP or HTTPS route on your website that will process inbound SMS.Starting Price: $3 per 50 texts -
2
Textr Team
Textr
Increase customer engagement with an automated business phone system with all your calling and texting needs in one app. We have apps for all use cases, from personal to business. For individuals who carry multiple phones and wish to handle all business phone communication in one automated platform that is synced across all of their devices. Save thousands of dollars on a new device, phone plan, and phone number when starting your small business. We offer a lightweight CRM, IVR attendant, SMS campaign features, and more to boost business productivity. Textr Team is the perfect solution for freelancers and sole proprietors who want to message and call their clients or customers on one automated platform. Add your collaborators to Textr Team and cut down your business communication costs. The key to success is enabling your team with next-gen digital tools. Our outbound sales features allow your representatives to focus on clients and closing potential leads.Starting Price: $6.99 per month -
3
klink.cloud
K-LINK
klink.cloud is a comprehensive omnichannel contact center platform that unifies all customer interactions across multiple channels, including voice, video, email, SMS, and social media. It features robust in-app voice and video calling capabilities, conversational AI and chatbots for automation, and virtual numbers from over 80 countries. The platform offers advanced CRM and ticket management systems, complete with help desk ticketing, team collaboration, and custom reporting. Its IVR and ACD systems ensure efficient call routing, while comprehensive call management tools provide real-time metrics and detailed performance reports. Seamless API integrations allow for easy synchronization with existing tools, enhancing the platform's flexibility and functionality. Enterprise-ready and scalable, klink.cloud is designed to streamline customer support operations, improve customer satisfaction, and deliver a seamless customer experience across all touchpoints.Starting Price: $14.99 -
4
Zernio
Zernio
Zernio is a unified social media API platform that enables developers and AI agents to publish, schedule, and manage content across 14+ social networks through a single integration. Instead of building separate integrations with each platform, developers make one API call and Zernio handles authentication, media formatting, rate limits, and platform-specific requirements. The platform supports post scheduling, content management, comments and DMs automation, analytics tracking, ads management, and media uploads. It integrates with Instagram Business and Creator APIs, TikTok Business API, LinkedIn, YouTube, Twitter/X, Facebook, Pinterest, Reddit, Threads, Bluesky, and WhatsApp Business API. Features include automatic token refresh, webhook notifications, and rate limit management. Built for SaaS companies, agencies, and AI agent builders, the product is fully white-label.Starting Price: $19/month -
5
Kapso
Kapso
Kapso is a developer-focused platform designed to make it fast and simple to integrate WhatsApp into products, enabling teams to build messaging features, AI agents, and automated workflows directly on top of WhatsApp. It provides a ready-to-use API and infrastructure that allows developers to connect a WhatsApp number in minutes, access messages, contacts, and conversations in real time, and build applications without dealing with the complexity of Meta’s native setup. It includes tools for creating AI agents, designing conversational flows, and automating interactions, allowing businesses to handle messaging, notifications, and customer engagement directly within WhatsApp. Kapso also offers a visual workflow builder, serverless functions, and support for voice agents, enabling developers to create multi-step automations and even mini-applications inside WhatsApp conversations.Starting Price: $25 per month -
6
AgentPhone
AgentPhone
AgentPhone is a developer-focused platform that enables artificial intelligence agents to interact with the real-world phone network by assigning them actual phone numbers capable of receiving SMS messages and voice calls through a unified webhook system. It allows users to programmatically provision phone numbers, handle inbound and outbound communications, and process conversations in real time without managing the underlying telephony infrastructure. It simplifies the complexity of telecommunication by abstracting carrier-level operations, letting developers focus on building conversational logic and automation workflows. With AgentPhone, AI agents can be created in minutes to engage in dynamic interactions, respond to messages, and execute tasks triggered by phone-based communication. It supports both voice and text channels, enabling seamless integration of conversational agents into applications that require real-time user interaction.Starting Price: $8 per month -
7
Zavu
Zavu
Zavu is one API for all your messages, built to send and receive SMS, WhatsApp, Email, Voice, Telegram, and more from a single integration. It helps developers ship messaging instead of maintaining messaging infrastructure, replacing separate APIs, SDKs, auth models, webhook formats, sender setup, template approvals, and error handling with one SDK, one webhook format, and one dashboard. Zavu is also built for AI agents from day one: agents can send SMS, WhatsApp, Email, and Voice globally, while developers can use production-ready SDKs across languages such as Node.js, Python, Ruby, Go, PHP, and Java. Its Smart Send and AI Routing features pick SMS, WhatsApp, or Email per contact, choose the best or cheapest delivery path using platform-wide delivery intelligence, and fall back automatically when a channel fails. Context is preserved, delivery is deduplicated, and cost is tracked end-to-end across the fallback chain.Starting Price: $21 per month -
8
Chert
Chert
Chert is iMessage infrastructure for reaching people at scale, providing the API and workflow layer for sending, receiving, routing, and observing real iMessage conversations. It lets teams build and deploy AI on iMessage while maintaining quality, trust, and personalized interaction, with blue-bubble threads from verified numbers delivered like native iMessage. Typing indicators, reactions, reply context, read receipts, and attachments stay intact for AI or human follow-up, while multi-recipient threads support named senders and clean handoffs. If a recipient is not on iMessage, conversations can fall back to SMS or RCS, with delivery status surfaced per message. Workflow primitives include phone number pools, reply routing, webhooks, and audit trails, and the same API can start a thread, interpret a reply, and move the workflow forward.Starting Price: Free -
9
CDYNE
CDYNE
CDYNE offers reliable and flexible SMS, voice, phone number verification and address verification API's that are easy to integrate and scale for your business. When you combine our SMS API gateway with these awesome features, anything is possible! Our SMS API delivers the tools you need to boost company sales, revenue, customer engagement, and stay connected with your customers. Send mass text messages to customers fast from a memorable 5-6 digit phone number. Send text messages to users of your application, website, or software to ensure secure logins. Automate your entire SMS campaign and the response customers receive after replying. Recipients can easily remove themselves from your SMS campaign with a click of a button. Get detailed reports on how many text messages are sent, plus more valuable data. Use multiple phone numbers to deliver even more text messages to your entire contact list. -
10
Bandwidth
Bandwidth.com
You want the best quality voice, messaging, and more. To get them, you need the only API provider with its own nationwide network. You can eliminate the middleman, save on costs, give yourself more control, and build the application that your customers are craving. You’re not new to this, but you need a partner to help you reach the scale you know you’re capable of. Whether you’re bringing your own carrier or building your own solution from the ground up, Bandwidth has the tools you need to reach your maximum potential. Bandwidth is a communications platform with limitless flexibility. You need integrations, enterprise-class APIs, and tools to manage your communications stack intelligently. We are open where you need it the most, with optionality and control. Our global network is directly connected to where it matters most. Giving unmatched reliability. Bringing your customers closer. Scaling wherever your business takes you. -
11
The SMS Works SMS API
The SMS Works
At the SMS Works, we only bill you for delivered text messages. Our prices are amongst the lowest in the UK. Message costs start at 3.45 pence + VAT and go as low as 2.75 pence for larger volumes. On average, our customers save over 30%. Compare us with other SMS Gateway companies on our price comparison table. Contact us for a quote if you'd like us to beat an existing price. For high SMS volume customers, sending and receiving over 50,000 texts a month, we offer even lower rates. With our free SMS API, you only pay for SMS credits; there’s no contract or minimum order. We only charge you for delivered messages. Failed texts are credited straight back to your account. Almost all SMS companies charge for failed texts, when they haven't been charged themselves. You can save as much as 18% by not paying for undelivered texts. Our delivery reports give you a detailed outcome of all texts sent, including refunded SMS credits. -
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TeleSign
TeleSign
Deliver timely, personalized information through global SMS/RCS and voice cloud communications. Gain a deeper understanding of your customers from actionable global phone number and subscriber data intelligence. Code once and message your customers at scale using TeleSign’s Messaging API - complete with waterfall delivery between channels. TeleSign Messaging API includes SMS, RCS, and WhatsApp to help you build secure digital communications that connect you with your customers anywhere in the world. Integrate a single Messaging API and start sending reliable, secure SMS, RCS and WhatsApp messages to your customers today. Choose one or all three channels to broaden your programmable messaging strategy and expand your audience. Reach more customers with 120+ optimized points-of-presence and 700+ direct-to-carrier routes. -
13
TheTexting
TheTexting
TheTexting’s Messaging API allows you to exchange Short Message Service (SMS) and Multimedia Message Service (MMS) communications to 180+ countries worldwide. Using TheTexting’s powerful Messaging API, users send millions of messages around the globe every day. With simple integration and a 24/7 technical support, you can enjoy the perks of swift global communication and enable messaging on any website, application or system. Plus, you can facilitate two-way messaging where applicable using long numbers as well as send messages with your business name where Sender ID is supported. In simple terms, an API is a set of clearly defined methods of communication between various software components. In Messaging, an API is used as a bridge that connects a software/application to a Messaging provider application to serve as a relay in sending messages to mobile users. This allows users to integrate messaging services with their website, third-party applications, mobile applications and CRM.Starting Price: $0.06 one-time payment -
14
SignalWire
SignalWire
An elastic communications cloud with advanced APIs for voice, SMS and video designed by the original geeks of software-defined telecom. When your audience is large, your brand is premium, and you won't settle for janky video conferencing UX, you want this. Real time, granular control over call flows, routing, and codecs. 300% more responsiveness than you get with REST. If you use AI in your voice apps, you just found your new favorite API. If you're more comfortable with REST than WebSockets or already use TwiML, these APIs are like TwiML...if TwiML suddenly knew Kung Fu. The SMS API makes it easy to move your expensive SMS traffic to SignalWire and cut your billio 50-80% in the process. Launch and scale communication products on infrastructure built for this decade and the next rather than running aground on the limitations of 2010s-era SaaS. Persistent, bi-directional connections between your video and voice apps and our infrastructure means 300% more responsiveness. -
15
sms77
sms77.io
Professional solutions for your company to send and receive SMS. Online, via API, by email or directly in your app. Easy. Fast. Reliable. We send via the best routings with high reliability. We make sure your SMS are delivered. Our prices are fair and transparent. You only pay for what you use. Thanks to our SMS API, the SMS transmission can be integrated into almost any application in a short time. Use our SMS Gateway with groundbreaking technology for your application. Realize your projects with our powerful messaging APIs.Starting Price: 0.075€ per SMS -
16
Amazon Simple Notification Service (SNS) is a fully managed messaging service for both system-to-system and app-to-person (A2P) communication. It enables you to communicate between systems through publish/subscribe (pub/sub) patterns that enable messaging between decoupled microservice applications or to communicate directly to users via SMS, mobile push and email. The system-to-system pub/sub functionality provides topics for high-throughput, push-based, many-to-many messaging. Using Amazon SNS topics, your publisher systems can fanout messages to a large number of subscriber systems or customer endpoints including Amazon SQS queues, AWS Lambda functions and HTTP/S, for parallel processing. The A2P messaging functionality enables you to send messages to users at scale using either a pub/sub pattern or direct-publish messages using a single API.
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17
Voxvalley CPaaS
Voxvalley
The cloud communications platform by Voxvalley allows you to add real-time communication features to your existing web and mobile applications easily, using secure and scalable SDKs/APIs. SMS API can help your business to implement two-way communication with customers. This can be done effectively with the help of long codes and short codes. Using this, short codes let you send large volumes of B2C messages, and long codes can help you to run SMS promotional campaigns. With SMS API integration, you can have a unique sender ID, with which customers can identify and recognize your brand easily. Also, you may send promotional and transactional alerts via SMS to keep your customers updated and engaged. You can have the DID numbers for International calling/toll-free numbers that allow you to reach the customers with local numbers, which is more trustworthy. With DID numbers, you can also avail HD audio quality and good coverage at an affordable cost. -
18
Proovl
Proovl
Choose your SMS number from any of 24 countries. Whatever you prefer using, WebSMS or SMS API. Start global SMS messaging right away. Connected to more than 1017 mobile and landline networks worldwide. High-throughput routes powered by data centers in Europe and USA. Quick online sending through WebSMS under the console. Dedicated SMS API for bulk messages sending and receiving. Inbound messages forwarding to another phone number, e-mail address, or script URL. Our SMS Phone Numbers from the different corners of the world will let you text your partners, employees, customers, friends, and family around the globe. Virtual mobile or SMS numbers dedicated to 2-way SMS communication. Just a real mobile number located on a SIM card and hosted in our data center to receive any SMS. Personalized bulk messaging. Operate with Unicode. Long-term SMS numbers lease, SMS SIM numbers, virtual mobile numbers. -
19
MessageWhiz
MessageWhiz
23 billion text messages are sent every day around the globe, making messaging applications one of the most widely used mobile apps. Businesses in every industry are tapping into the power of these linked, branded messages, using it to nurture leads, drive traffic, or confirm identification. MessageWhiz’s SMS business texting solutions are ideal for every industry, no matter where your business or customers are located. Our text messaging SMS solutions for business and company SMS campaign services provide instant communication. Delivered in real-time, and in context.Starting Price: €149 per month -
20
DIDforSale
DIDforSale
DIDforSale is a California-based telecommunications carrier. Services include SIP trunking, local DIDs, and toll-free numbers, outbound termination, an API, and network services such as E911, CNAM Lookup, and local number portability (LNP). With 10+ years of experience, DIDforSale has proven to be a leading wholesale VoIP origination and termination provider. Our network is optimized to minimize call drops, lags, and echoes. We partner with quality service providers both in the US and all over the world to handle your calls with amazing call clarity. Expand your local footprint with the USA's most extensive local phone number selection. Maximize Impact, and minimize effort with bulk SMS marketing. Elevate professionalism, and credibility, while expanding reach and engagement. Now you can easily send and receive text messages programmatically. Boost your business branding, increase recall, and gain a competitive edge.Starting Price: $0.0025 per minute -
21
Prelude
Prelude
Prelude is a developer-first platform for SMS delivery and user authentication: -Reliable high speed messaging via direct to carrier routes -Built-in OTP generation delivery and verification -Real-time dashboard for deliverability and performance monitoring -Anti-fraud protections to block abuse like SMS pumping -No markup on SMS costs — pay only for API calls -Multi-operator routing means no need for a backup provider -Clean API SDKs and webhooks for easy integration -Friendly responsive customer support via Slack Built for fast moving teams who want simplicity reliability and control.Starting Price: $0.03 per verification -
22
Text Torrent
Text Torrent
Text Torrent is a powerful bulk SMS and SMS API platform built for businesses that need secure, scalable, and compliant messaging. From promotional campaigns to transactional alerts, Text Torrent helps industries like e-commerce, real estate, healthcare, finance, restaurants, and nonprofits engage their audiences with 98% open rates.Starting Price: $49/month -
23
QuickSMS
QuickSMS
QuickSMS — Enterprise-grade business messaging (SMS, RCS & WhatsApp) QuickSMS is a security-first messaging platform that helps organisations send time-critical notifications, 2FA/OTP codes, appointment reminders, and marketing alerts at scale - across SMS, RCS Business Messaging, and WhatsApp Business. Built for reliability and compliance, QuickSMS is used by SMEs, public sector bodies, and enterprises that need auditable delivery, robust APIs, and fast onboarding. Why QuickSMS Omnichannel: SMS at the core, with optional RCS and WhatsApp Business to enrich messages with media, buttons, and branding. Deliverability & speed: High delivery performance (typical ~97%); real-time reporting and webhooks. Developer-friendly: Operator-scale routing: with international reach to 200+ destinations. Trust & Compliance (independently audited) ISO/IEC 27001, ISO 9001, ISO 14001, ISO 45001 certified Cyber Essentials & Cyber Essentials Plus certified Exceeds NHS DSP ToolkitStarting Price: $0 -
24
SendAPI
SendAPI
SendAPI lets businesses and developers send WhatsApp messages, SMS, OTP codes and transactional emails from one API key. One account, one dashboard, one flat monthly price. Official Meta Business Solution Provider with delivery to 190+ countries. Plans from $9.99/month with a 3-day free trial, no credit card required.Starting Price: $9.99 -
25
Sendara
Sendara
Sendara is a platform for CRM-based business messaging that routes outbound conversations through Apple’s native iMessage infrastructure instead of relying only on SMS. It connects directly with GoHighLevel, HubSpot, Close, Salesforce, and Pipedrive while keeping existing workflows, triggers, automations, and sequences intact. Each account can use a dedicated phone number, giving leads a consistent contact while supporting iMessage for iPhone users, RCS for compatible Android devices, and automatic SMS fallback for everyone else. Teams can also send messages from the web app, mobile app, or Chrome extension. Real-time read receipts and typing indicators provide engagement visibility, while voice messages, high-resolution images, and videos support richer customer conversations. FaceTime calling can be initiated directly from the CRM, and agencies can manage multiple clients with dedicated lines and unified reporting from one account.Starting Price: $249 per month -
26
Project Blue
Project Blue
Project Blue is an iMessage and SMS marketing platform that turns an existing CRM into a direct business messaging channel without requiring users to send from a personal phone. It provides dedicated messaging lines and connects with CRMs such as HighLevel, Close, and HubSpot, allowing sales teams to send iMessages directly from their normal workflows. If iMessage is unavailable, intelligent detection automatically falls back to SMS, while RCS support enables rich messaging with high-definition video, images, and voice notes across compatible devices. It also includes a business dialer built into the CRM for inbound and outbound calls, with automatic call logging, searchable transcripts, CRM sync, and AI-generated call outcomes. Messaging features include standard and AI-generated voice memos, voice cloning, HD media, Bitmoji cards, and support for marketing-specific numbers. Real-time analytics track response rates, message volume, delivery performance, and other KPIs.Starting Price: $250 one-time payment -
27
Dial
Dial
Dial is a communication stack for AI agents that gives software its own real phone identity: a number it controls to place and receive voice calls, send and receive SMS, and message over WhatsApp through one REST API, MCP server, CLI, or SDK. It rebuilds a telephone stack originally designed around humans, SIM cards, carrier contracts, handsets, and verification flows so autonomous agents can communicate without dedicated hardware or manual carrier setup. Agents can provision a real phone number, make AI voice calls that follow instructions such as booking, confirming, or following up, and use live transcription with optional transfer to a human. Dial also supports two-way SMS and WhatsApp messaging, inbound calls and texts, AI receptionist behavior, and streamed inbound events. Agents can receive SMS verification codes for phone-gated workflows and react to communication events programmatically.Starting Price: $3 per month -
28
MOBtexting
MOBtexting
Drop your carrier cord with hyper-local AI-enabled voice and smart messaging services including our easy-to-use global SMS API's with proficient support that enables you to innovate and ease out the communication complexity. We believe in creating unconventional and captivating customer experiences through programmable & customer friendly services under AI-enabled Cloud Telephony Solutions and Unified SMS Gateway APIs as an experienced global communication service provider. Ensuring the lowest latency & direct operators connectivity for hassle-free service to enterprises to reach your customers faster and in a secure way. Our platform is hosted on cloud to make our API's available for smooth communications.Starting Price: $0.0034 per SMS -
29
SMSit
SMSit
SMSit is a self-service SMS platform that allows you send text messages via an online interface with advanced options for fully managed SMS campaigns including instant top-up of your SMS credits. Send text reminders in just seconds with our easy to use quick SMS feature which you can access anytime with a just a simple click of your mouse. Send bulk SMS message campaigns to your customers for marketing & promotions with real-time reporting and trackable links so you can measure results. With SMS you will get your message in front of the recipient immediately and you can also send automated messages for billing reminders using our API. Allow your customers to SMS keywords to text a response number for instant offers and collect the numbers for mobile marketing. A virtual number is used together with SMS keywords and allows you to receive inbound text messages so you can engage your customers with 2 way SMS conversations. Add SMS functionality to your website with our SMS API. -
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TxtSync
TxtSync
We don’t think texting should be taxing. Which is why we’ve made SMS marketing easier, more reliable and more affordable than ever before. Using our intuitive web interface it’s a breeze to set up and track SMS marketing campaigns. Plus, you can use our SMS API or your existing products in sync with ours. Well, we are called TxtSync after all. We’ve made using SMS easier so you can focus on the important bit - the content. Whether it’s launching an SMS marketing campaign or chatting with customers, you’ll get it right every time. We offer the highest quality Tier 1 SMS that ensures reliable delivery. And at a fraction of the cost of competitors with UK SMS starting from 3.5p and discounts for high volumes. Start creating your SMS marketing campaigns with us. Make sending and receiving SMS part of your everyday workflow thanks to our Zapier or Microsoft Flow apps that give you the freedom to keep using your existing products. Or for more advanced integration try our RESTful SMS API.
