Callr

What is Callr?

Callr is a communication platform that prioritizes APIs; it was established in 2011. French company TCLR SAS and American company The Callr Corp offer different options for signing up to use this platform. The platform operates its own network of service providers, linking voice services, text messages, phone numbers, and AI-powered call analysis to corporate products and data systems.

It can analyze conversations between real people, and it also allows AI voice agents to take calls, filter them, schedule appointments, and transfer them. The product is available in over 220 countries, and it is particularly suitable for companies that need services related to communication development, compliance, and large-scale operations.

Core product capabilities

Programmable voice and text messaging

• Voice API: Initiates and receives inbound and outbound calls, and controls the process based on business events.
• SMS API: Send and receive notifications, verification codes, or business conversations.
• Phone numbers: Purchase, host, and manage local, free, and other numbers in multiple countries.
• SIP relay: Connects an enterprise phone system to the Callr operator’s network.
• Webhook: Pushes call, SMS, and status events to a customer relationship system or data platform.

Call tracking and attribution

Companies can assign numbers to channels, advertisements, or merchants, in order to keep track of calls, channels, duration, and outcomes. Market platforms and agents can use this data to determine the value of leads, calculate conversion rates, and attribute advertising efforts.

Session intelligence

Callr can convert calls into text and generate summaries, information on emotions, intentions, satisfaction levels, as well as custom structured fields. The results can be automatically imported into customer relationship management systems, business intelligence tools, and analysis software.

AI voice agents and voice mailboxes

AI agents can take over calls when no one is available to answer, when the line is busy, or as part of a specified process, carrying out tasks such as qualification screening, scheduling appointments, and handling inquiries. Issues that cannot be resolved can be passed on to a human operator along with all relevant details.

Built-in model

The platform allows connection to GPT, Claude, Mistral, Llama, or proprietary models owned by enterprises. The selection of models, prompts, the location where data is processed, and the output rules are all configured by the customer; therefore, Callr cannot be described as relying on a single model exclusively.

Callr Actions low-code workflows

Callr Actions uses YAML to define branches and actions, enabling the invocation of interfaces, the use of analysis tools, or the execution of AI tasks upon incoming calls, hang-ups, or other events. It is suitable for development teams that wish to reduce the need for building their own phone orchestration infrastructure.

Differences between live call analysis and AI-powered answering

Typical workflow

1. Choose the contracting entity in France or the United States, and verify the number formatting, data, and communication regulations of the target country.
2. Create a separate key in the testing environment, and purchase or obtain a number.
3. Use REST APIs or Callr Actions to configure incoming calls, outgoing calls, SMS messages, and branching logic.
4. If AI is enabled, select a model and define rules for transcription, summarization, intent detection, fields, and manual routing.
5. Connect to Salesforce, HubSpot, Google Analytics, Google Ads, or your own systems.
6. Testing is carried out using a real accent, busy lines, missed calls, call forwarding, and abnormal inputs.
7. After going live, monitor the call success rate, average duration, complaints, costs, and data write-back.

Suitable for users and scenarios

• Market platform: It connects buyers and sellers, and keeps track of the phone numbers associated with each merchant or advertising channel.
• Real estate companies: assign numbers to properties and stores, conduct analysis and consultations, and automatically update customer information.
• Automobile industry: Tracking dealer calls, scheduling test drives, and assessing sales quality.
• Marketing agents: Provide customers with quantifiable phone attribution and session analysis.
• Customer Experience Team: Creates reminder, notification, interactive voice, and manual transfer processes.
• Development team: Integrate voice, SMS, AI agents, and communication events into its own products.

Prices and packages

The currently available plans are Professional and Enterprise. Data usage, phone numbers, AI processing, optional services, and special connectivity options may be charged in addition to the basic subscription; the specific prices are provided through the customer portal or by sales staff.

The public page states that billing is done on a monthly basis, there is no setup fee and cancellation is possible at any time; it also offers an option to start using the service for free or on a trial basis. The trial period, the remaining communication credit, and the countries available for use are not specified uniformly in the public package details.

There are differences in the official statements regarding the contract duration.

The U.S. contract templates specify an initial term of 12 months, with automatic renewal for additional 12-month periods; to terminate the contract, a written notice must be submitted three months before the anniversary date. Even in the event of early termination, the subscription fees continue to apply until the end of the contract period.

The two versions of the description may vary depending on the contracting party, the type of customer, the order attachments, or the sales proposal. Before making a payment, it is necessary to refer to the actual settlement page, the order, the terms of the contract, and any written confirmation from the seller.

REST API, SDKs, and migration

The current primary interface is REST API v2, which provides OpenAPI 3.1 specifications, development documentation, interface descriptions, and change logs. The older JSON-RPC v1 version is now in the process of being phased out, with its service set to be discontinued on June 30, 2027.

1. The new project makes direct use of REST API v2, and clients in the required languages are generated from the OpenAPI specifications.
2. The existing project reviews the old JSON-RPC methods, authentication, response fields, and error handling.
3. Map it to the v2 endpoint according to the migration guidelines, and perform dual-writing or comparative verification in the testing environment.
4. Update the monitoring, retry, Webhook, and number management logic, then gradually switch to production traffic.
5. Remove dependencies on old SDKs and older interfaces before the shutdown date.

Data residency and privacy

When creating an account, you can choose either French TCLR SAS or American The Callr Corp as the entity responsible for contracting and data management. The applicable laws, contracts, billing procedures, and data governance rules differ for these two options.

• Collect data such as companies, contacts, bills, registration documents, communication records, numbers, as well as time and duration.
• The recording can be deleted by the customer or saved on their own server; the location where the transcription is processed depends on the path selected.
• The privacy page states that call records are stored for 3 years, for use in billing, resolving disputes, and ensuring compliance with legal requirements.
• The U.S. contract template states that traffic data can be stored for up to 12 months; the specific types of data and the parties involved need to be confirmed one by one.
• As the data controller, the customer is responsible for lawful basis, notification, retention period, cross-border transfer, and third-party connections.
• Callr Actions can send data to external services; before enabling it, minimization, pseudonymization, and permission checks should be carried out.

Safety, compliance, and usage restrictions

• The platform uses TLS and SRTP to secure the transmission of media and voice data, and it operates in multiple data centers.
• Different keys should be used for development, testing, and production environments, and separate keys should be assigned to individuals or services.
• The number is not permanently owned by the customer; it may be changed for technical or regulatory reasons, and it can be reallocated after it is discontinued.
• Customers must comply with the regulations regarding communication, marketing, recording, real-name registration for numbers, privacy, and call rejection in the target country.
• The default limits for contracts in the United States are 10 concurrent channels and 1 call attempt per second; higher requirements need to be requested in advance.
• AI-generated summaries, as well as assessments of emotions and intentions, can be inaccurate; therefore they should not be used as a substitute for human quality control, regulatory decisions, or important business decisions.

Summary

The value of Callr lies in bringing together operator networks, programmable voice messages, call tracking, and AI analysis on a single platform, while allowing companies to choose the models and data management approaches they prefer. Before making a purchase, it is essential to check the costs associated with usage beyond the basic subscription, the process of interface migration, number compliance requirements, as well as any discrepancies between the stated cancellation terms and the actual contract duration.