Best SMS API Providers for Close

Compare the Top SMS API Providers that integrate with Close as of October 2026

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This a list of SMS API providers that integrate with Close. Use the filters on the left to add additional filters for products that have integrations with Close. View the products that work with Close in the table below.

What are SMS API Providers for Close?

SMS API providers, also known as SMS gateway providers, offer technology that enables software applications to send, receive, and track Short Message Service (SMS) messages over an internet protocol. They provide a way for businesses to communicate with customers in real-time via text as an integrated part of their overall communication strategy. These services are often cost-effective and easy to integrate into existing systems. Additionally, providers typically offer support in the form of user guides and documentation. Compare and read user reviews of the best SMS API providers for Close currently available using the table below. This list is updated regularly.

1

Textellent

Textellent

Textellent's robust business texting services provide SMS and MMS capability for customer service, sales, and marketing texting programs. Textellent's business texting solution makes designing, managing, measuring, and integrating SMS and MMS campaigns easy. Whether used for customer service, sales, or marketing, Textellent supports your customer journey with an easy-to-use service that text-enables local business lines and serves businesses of any size. Robust scheduling and appointment reminders are also available, as are keywords and shortcodes for easy opt-in programs with TCPA compliance supported by AI. In addition, Business Texting is supported directly from any web application or web page via Textellent Messenger (a free Google Chrome extension.)

49 Ratings

Starting Price: $59 per month

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2

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

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3

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

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4

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

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