voip
25 articles
6 minKore.ai Alternative: When to Pick Something Lighter
Kore.ai serves large enterprises with heavy compliance needs. For most teams, a lighter alternative is a better fit. Here is how to decide.
7 minLocal vs Toll-Free Numbers for AI Phone Agents: Which to Use When
The real difference between local and toll-free phone numbers for AI phone agents. Answer rate data, cost comparison, and when each type actually makes sense.
5 minAir.ai Alternative: Developer-First Voice AI Without the Pricing Mystery
Looking for an Air.ai alternative with transparent pricing and a developer-first workflow? A practical comparison of what each platform offers and who fits where.
7 minRetell AI Alternative: A Developer's Honest Comparison
Looking for a Retell AI alternative? An honest comparison of pricing, developer experience, features, and the specific cases where each platform wins.
8 minDTMF vs Voice Recognition: When to Use Each for AI Phone Agents
When to use DTMF keypad input versus voice recognition in AI phone agents. A practical guide to the trade-offs, the hybrid pattern, and the cases where each wins.
8 minConversational AI Platforms: The 2026 Landscape and Who Should Use What
A practitioner's guide to conversational AI platforms in 2026. Who leads, who is consolidating, and which category of platform fits which kind of buyer.
9 min8 KPIs Every AI Outbound Calling Campaign Should Track
The metrics that actually tell you whether your AI outbound calling campaign is working. Connection rate, qualification rate, conversion, and five more that matter.
9 minHow AI Voice Bots Qualify Leads Automatically (and Where They Fail)
A practical guide to automated lead qualification with AI voice agents. The right questions to ask, the scoring patterns that work, and the failure modes to avoid.
9 minHow to Buy an AI Phone Number: Providers, Pricing, and Pitfalls
A practical guide to buying a phone number for an AI voice agent. Provider comparison, pricing breakdown, country coverage, and the pitfalls that catch most buyers.
7 minMultilingual AI Voice Agents: What Works in 2026
A realistic look at multilingual AI voice agents in 2026. Which languages work well, which fall apart, and how to architect an agent that serves multiple languages reliably.
9 minContact Center Automation Trends for 2026: What Actually Matters
The AI hype era is over. Here are the contact center automation trends that actually matter in 2026: agentic AI, voice agents, CCaaS consolidation, and the risks.
10 minBackchanneling in Voice AI: Why the Small Sounds Matter
Backchanneling is why AI voice agents either feel human or feel broken. Learn what it is, the research behind it, and how to implement it in real systems.
6 minText-to-Speech for AI Phone Agents: ElevenLabs vs Deepgram vs PlayHT
Compare text-to-speech providers for AI phone agents. ElevenLabs, Deepgram, PlayHT, and built-in model voices evaluated on quality, latency, and cost.
8 minIs It Legal to Record Phone Calls? A 2026 State-by-State Guide
Federal law allows one-party consent. 12 US states require all-party consent. Learn which states, how to stay compliant, and what it means for AI phone agents.
6 minElevenLabs Alternative: Best Voice AI Platforms for Developers in 2026
Looking for an ElevenLabs alternative? Compare voice AI platforms on quality, latency, pricing, and phone agent capabilities. Developer-focused breakdown.
6 minAmazon Lex vs Dialogflow: Which Voice AI Platform Should You Choose?
Compare Amazon Lex and Google Dialogflow for building voice AI applications. Pricing, NLU quality, integrations, and when to consider telephony-native alternatives.
8 minVoice App Development: A Complete Guide to Building AI Phone Agents
A complete developer guide to building AI voice applications. Learn the architecture, tools, and step-by-step process for creating AI phone agents.
11 minVoicemail Detection for AI Phone Agents: A Developer Guide
Learn how voicemail detection works for AI phone agents, why it matters for outbound campaigns, and how to handle answering machines programmatically.
10 minVoIP AI: How Artificial Intelligence Is Transforming Voice Communication
Discover how AI is reshaping VoIP with real-time voice agents, smart call routing, and automated conversations. Learn to build AI-powered voice apps.
11 minWarm Transfer vs Cold Transfer: Smart Call Routing for AI Agents
Learn the difference between warm and cold call transfers, how AI phone agents handle each, and how to implement smart call routing with a telephony API.
12 minCall Analysis with AI: Extracting Insights from Every Phone Conversation
Use AI call analysis to extract transcripts, sentiment, outcomes, and actionable insights from every phone conversation. Developer guide with examples.
9 minVapi Alternative: Comparing AI Phone Agent Platforms for Developers
Looking for a Vapi alternative? Compare AI telephony platforms on pricing, latency, flexibility, and developer experience. Honest side-by-side breakdown.
7 minWhat Is SIP Trunking? A Guide for AI Voice Applications
Understand SIP trunking and how it connects AI voice applications to the phone network. Learn the architecture, benefits, and when you need it vs. a telephony API.
11 minAI Outbound Calls: Build Automated Calling Campaigns with an API
Build AI outbound calling campaigns that scale. Learn how to automate sales calls, follow-ups, and surveys with a telephony API and your own AI model.
8 minAI Cold Calling: How AI Phone Agents Are Replacing Manual Dialers
Learn how AI cold calling agents automate outbound sales calls, reduce costs, and scale faster than manual dialers. Build your own AI caller with BubblyPhone.