Communication API Evaluation Checklist: What to Verify Before You Commit

What’s Covered

This checklist covers the evaluation of chat APIs, video SDKs, and unified communication platforms. It applies whether you are building a messaging-only integration, a video-only implementation, or a full communication stack covering both.

It focuses on verifying vendor claims — not explaining how communication APIs and SDKs work or what compliance requires in detail. For those topics, see our related topic guides.

If your team hasn’t yet decided whether to build communication infrastructure in-house or procure it, resolve that decision first. See Build vs Buy for Communication Infrastructure → before working through this checklist.

How to Use This Checklist

The sections below are intended to help teams verify vendor claims before committing to an integration. Some items can be confirmed through documentation, while others require direct discussion, demonstrations, or written confirmation from the vendor.

Evaluation Areas as a Glance

1. Feature Completeness and Roadmap

The feature list is the starting point of evaluation — not the end of it. What matters is whether the features that appear in the demo exist in production, perform reliably under real conditions, and will still be available and maintained twelve months from now.

Verify:

• Every feature demonstrated is confirmed as generally available in production — not beta, not roadmap
• Core messaging features are confirmed: one-to-one and group chat, message history, read receipts, typing indicators, offline queuing, push notifications, file sharing
• Core video features are confirmed if applicable: one-to-one and group calls, screen sharing, recording, adaptive bitrate handling, cross-platform support
• AI-assisted features — transcription, summarisation, smart replies — are confirmed as production-ready if required
• Product roadmap for the next 12 months is available in writing with clear production, beta, and roadmap status for each item

Ask the vendor directly:

“Which features you have demonstrated today are generally available in production — and which are in beta or on the roadmap?”

Watch for:

Features presented in demos that require configuration flags, beta access, or are contingent on a pricing tier the vendor hasn’t yet discussed. If a vendor cannot clearly distinguish between what is live and what is coming, treat the feature as unavailable.

2. Developer Experience

A communication API or SDK that is difficult to integrate costs more in engineering time than its licensing fee saves. Developer experience is an evaluation criterion, not a preference.

Verify:

• Reference documentation is current, complete, and covers your target platforms — iOS, Android, web, React Native, Flutter
• Code samples exist in your target language and framework — not just conceptual examples
• UI kits or pre-built components are available and genuinely customisable — not just themeable
• A sandbox or free trial environment is available before commitment — and its limitations relative to production are clearly specified
• SDK changelogs are maintained and version history is accessible
• GitHub repositories are active — check last commit dates, open issues, and response times

Ask the vendor to demonstrate:

A developer on your team integrating the SDK from scratch using only the published documentation — or as close to that as evaluation time allows. How far they get, and where they get stuck, is more informative than any vendor walkthrough.

Watch for:

Documentation that describes what the API does without explaining how to implement it. SDKs with long integration timelines in vendor case studies. Support that routes through a sales team rather than a technical team.

3. Compliance Architecture

In regulated industries, compliance is the entry-level requirement — not a differentiating feature. The evaluation mistake that creates the most post-deployment risk is verifying that a vendor is “HIPAA compliant” without verifying what that compliance actually covers.

Verify in writing:

• A Business Associate Agreement is available at evaluation stage — not introduced for the first time at contract stage
• BAA coverage extends across all components handling protected health information:
  • Messaging processing layer
  • Video infrastructure
  • File and media storage
  • Push notification infrastructure
  • AI processing layer if applicable
  • Any third-party components the vendor uses
• Encryption is confirmed in transit and at rest across every data layer — not just stated as present
• Audit logging captures who accessed what and when — and logs are retrievable in a format that satisfies a compliance review
• Data retention and deletion policies are documented and configurable

Ask the vendor directly:

“Which specific components of your platform are covered under your BAA — and which, if any, require a separate agreement or fall under a third party’s compliance framework?”

Watch for:

Vendors who confirm HIPAA compliance at the hosting level without addressing the messaging or AI processing layer. A BAA that covers infrastructure but not the communication layer is the most common compliance gap in this category — and the most expensive to discover after go-live.

For a full treatment of compliance requirements in the messaging context, see What Is a HIPAA-Compliant Chat API?

For video infrastructure compliance, see What Is HIPAA-Compliant Video Conferencing?

4. Security Architecture

Compliance and security are related but distinct evaluation areas. A platform can meet HIPAA requirements and still have security architecture gaps that create exposure under non-compliance conditions.

Verify:

• Encryption standards are specified — AES-256 at rest, TLS 1.2 or higher in transit — not just described as “encrypted”
• Token-based authentication is implemented — confirm the authentication model and token lifecycle management
• Role-based access controls are available and configurable — not just binary admin/user permissions
• SOC 2 Type II certification is current — request the report, not just confirmation that it exists
• Penetration testing results are available on request under NDA
• Incident response and breach notification procedures are documented and available

Ask the vendor directly:

“If we experienced a data breach tomorrow involving messages sent through your platform — what would your incident response look like, and what would appear in our breach notification?”

Watch for:

SOC 2 Type II claimed but not producible on request. A vendor confident in their security posture will share the report under NDA without hesitation. Vendors who cannot produce it are either not certified or not current.

5. Deployment and Data Residency

Where your data lives is an architectural decision with long-term compliance and operational consequences. Many teams discover that a deployment model they require is unavailable — after the integration is already built around assumptions that were never confirmed.

Verify:

• Available deployment options are confirmed in writing: cloud, private cloud, on-premise, hybrid
• Data residency options are available if your deployment requires data to remain in a specific jurisdiction or cloud environment
• Multi-region deployment is available if your user base spans geographies with different data residency requirements
• Migration path is documented if you need to move between deployment models as requirements evolve
• Infrastructure SLAs covering uptime and response time are available in writing — with defined penalties for breach

Ask the vendor directly:

“If we needed to move from cloud hosting to private cloud deployment twelve months from now — what does that process look like, and what would it cost?”

Watch for:

Vendors who describe deployment flexibility in general terms but cannot specify what is available at your plan tier. Flexibility that exists only at enterprise pricing is not flexibility for most evaluation scenarios.

6. Scalability and Performance

A communication API or SDK that performs well at pilot scale may behave very differently at production load. The performance profile under real conditions — degraded networks, concurrent connections, peak load — is what determines whether the infrastructure holds up when it matters.

Verify:

• Latency benchmarks are available for message delivery under load — not just stated as “low latency”
• Concurrent connection capacity is specified and demonstrated or evidenced — not estimated
• Video call performance under degraded network conditions is documented — specifically adaptive bitrate handling and graceful degradation behavior
• Auto-scaling behavior under traffic spikes is confirmed — including what happens at the boundary of a plan tier
• Message delivery guarantees are specified — ordering, retry logic, and behavior when delivery fails

Ask the vendor to demonstrate:

Performance benchmarks from existing production deployments at comparable scale — not controlled test environments. If the vendor cannot produce evidence of production performance at your required scale, treat scalability as unverified.

Watch for:

Latency figures stated without specifying conditions. Concurrent connection limits that apply at a lower plan tier than the one being evaluated. Group video performance that has only been tested in controlled environments.

7. Pricing and Commercial Terms

Pricing that works at pilot scale frequently behaves differently at production volume. Understanding the full cost structure — including overage behavior, plan boundaries, and renewal terms — is as important as understanding the platform’s technical capabilities.

Verify:

• Pricing structure is understood at your expected usage volume — per monthly active user, per message, per minute of video, or flat rate
• Volume thresholds that trigger pricing changes are documented
• Overage costs are specified — and the cost of exceeding current plan limits at 2x projected volume is calculated before commitment
• Features included at each plan tier are clearly specified — compliance features, deployment options, and support levels should not be assumed to be universal
• Contract terms allow for workflow changes and integration additions without renegotiation
• Data ownership terms are explicit — conversation history, session data, and integration logic remain yours on exit
• Exit terms and data portability on contract termination are documented

Ask the vendor directly:

“Walk me through what our bill looks like at twice our projected monthly active users — including overage charges, any plan tier changes that would be triggered, and what features we would gain or lose in the process.”

Watch for:

Pricing pages that show base rates without specifying what is included. Compliance features — HIPAA-compliant hosting, BAA, audit logging — that appear only at enterprise tiers not discussed during evaluation. Data export limitations or fees on contract termination.

8. Support and Vendor Stability

A communication API or SDK creates a deep integration dependency. The vendor’s responsiveness, stability, and development trajectory matter as much as the current feature set — because they determine what the integration looks like twelve months from now.

Verify:

• Technical support is accessible directly — not routed through a sales team or a general support queue
• Support response time commitments are documented and tier-specific
• Developer community channels — Discord, Slack, GitHub — are active and responses are timely
• The vendor’s customer base and funding position are publicly available or verifiable — a communication infrastructure vendor that doesn’t survive is an integration that needs to be rebuilt
• API versioning policy is documented — specifically how long previous versions are supported and what migration looks like when versions are deprecated
• Dedicated onboarding support is included — and what is included versus billable is clearly specified

Ask the vendor directly:

“If we encounter a production issue at 2am on a Sunday — what does our support path look like, and what is your committed response time at our plan tier?”

Watch for:

Support that is described as responsive during evaluation and defined as business-hours-only in the contract. API deprecation policies that give short migration windows. Developer communities with long response times or unanswered questions on common integration issues.

The QuickBlox Perspective

The two evaluation criteria that procurement processes most consistently skip — and that production performance most consistently reveals — are compliance architecture depth and scalability under real conditions.

On compliance: most vendors in this space will confirm HIPAA compliance when asked. The question that actually surfaces the gap is which specific components are covered under the BAA. Messaging processing, video infrastructure, file storage, and AI layers are each distinct compliance obligations. A BAA that covers hosting but not the communication layer is not a HIPAA-compliant communication infrastructure — it is a compliance gap waiting to surface under audit.

On scalability: pilot environments do not replicate production conditions. Degraded networks, concurrent connections at real load, group video at real participant counts, and offline message delivery across devices are the conditions that determine whether infrastructure holds up — and they are consistently absent from standard vendor evaluations. Ask for evidence of production performance, not test environment benchmarks.

QuickBlox provides chat APIs, video SDKs, and communication infrastructure with HIPAA-compliant hosting, flexible deployment options — cloud, private cloud, and on-premise — and a single BAA covering the full communication stack including messaging, video, file storage, and AI processing. If you are working through this checklist against specific vendors and want to compare notes on what you are finding, we are happy to walk through your requirements directly.