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Latest explorations & insights from our team

Build Log

Where the Work Went Next

Three weeks after the last field report: the reasoning sidecar shipped as public research with its numbers attached, a year of deployments distilled into two trust findings, and a go-to-market rebuilt around the person who actually calls the API — plus the insight each track produced.

August 5, 2026
Privacy & Trust

DPDP for Virtual Meetings: Consent Is No Longer Optional

India's DPDP Rules were notified on 13 November 2025. Substantive obligations commence 13 May 2027 — about nine months from today. For anyone recording, transcribing, or running AI notetakers on meetings, consent stops being a banner and becomes something you have to prove.

August 5, 2026
Comparison

Vapi Alternatives: Where Developers Go When Voice Isn't Enough

Vapi is a good developer platform for voice agents — pay at cost, assemble your own stack, no platform fee. People look elsewhere when the conversation needs video, when the human needs grading, or when they want fewer pieces to assemble.

August 5, 2026
Engineering

Unified AI Context: One Memory, Many Agents

Every agent you add multiplies the re-explaining. The fix isn't a bigger context window — it's a shared context layer, and the hard part isn't storage. It's deciding that two names are the same person.

August 5, 2026
Comparison

Retell AI Alternatives: 6 Platforms Compared for Voice and Video Agents

Retell is a strong phone-agent platform with real post-call analysis and certified compliance. People look for alternatives when the conversation moves to video, or when what needs grading is the human on the call rather than the agent.

August 5, 2026
Product

What Is a Conversational Video API?

A conversational video API lets software join a live video call as a participant — seeing the camera and shared screen, taking turns, pursuing goals, and returning a structured result. Here are the seven parts of the stack and which ones actually decide whether it works.

August 5, 2026
Product

AI Notetaker vs AI Meeting Agent: What's Actually Different

A notetaker needs the meeting to happen with you in it. A meeting agent needs it to happen without you. Everything else — vision, goals, scoring, tool calls — follows from that one difference.

August 5, 2026
Engineering

AI Meeting Webhooks: Events, Signatures, and the Retry Ladder

Nine events, one signature scheme, and a five-step backoff ladder. Everything you need to wire an AI meeting API into your own pipeline without polling, plus the three mistakes that break integrations in production.

August 5, 2026
Engineering

AI Meeting SDK: What You Actually Need, and What You Should Skip

Most teams searching for an AI meeting SDK don't want a package — they want to write less code. Here's the honest breakdown: two REST calls, eight webhook events, a forty-line client you own, and the agent-native path that's replacing SDKs entirely.

August 5, 2026
Product

The AI Booking Page: A Scheduling Link That Doesn't Cost You the Hour

A normal booking link books your time. This one books the meeting — an AI persona takes the call, and you get the transcript, the scores, and the recording. Here's how to set one up in about five minutes.

August 5, 2026
Product

An AI Assistant for Your 1:1s — What It Can and Can't Take Off You

Eight recurring 1:1s a week is a full working day, every week, forever. Here's what an AI that actually takes the call — not one that transcribes it — changes, and the conversations you should never delegate.

August 5, 2026
Developer Guide

How to Choose an Enterprise Voice AI Stack, Not Just a TTS Vendor

Teams spend weeks benchmarking TTS vendors for sub-200ms time-to-first-audio, ship, and the agent still feels slow. TTS is one stage in a four-stage latency budget. How to evaluate the whole enterprise voice AI stack: latency measurement, turn detection, deployment model, model swappability, and multi-turn accuracy.

July 29, 2026
Perspective

The Voice AI Coworker: When Your AI Teammate Joins the Meeting

A voice AI coworker isn't a notetaker. It's a colleague you send to the 1:1s and calls you'd rather not be in — one that runs the meeting, asks the follow-up, and hands you the transcript and decision. Claude Code proved AI can be a coworker in a terminal. The next AI coworker joins the call.

July 29, 2026
Research

ORI Utter: Voice for Your Text Agents

A systems note on ORI Utter — the speech runtime under every Waterr meeting, now a deployment surface for text agents. Your agent keeps its loop, tools, and state; Utter runs the room: transport, turn-taking, recognition, synthesis, pacing, and the paper trail.

July 21, 2026
Thinking

The Coordination Tax: What AI Coworkers Change About Team Work

The coordination tax is the hidden cost every team pays but nobody itemizes — the status update that waited for standup, the decision that waited for the 1:1, the misunderstanding that survived three Slack threads. Give every person a personal AI EA and the tax collapses.

July 18, 2026
Product

Send an Agent - the Better Way to Run 1:1 Meetings

The best format for screening, training, and feedback has always been the 1:1 - and 1:1s are exactly the meetings teams can’t afford to run. Send Agent changes the math: create an agent with the right context, send a link, and every one of those conversations happens.

July 18, 2026
Product

AI Sales Roleplay APIs: Full Guide

An AI sales roleplay API lets your product run live practice calls where an AI plays the prospect, scores the rep against a rubric, and returns recording, transcript, and scores to your own system. Here is the full anatomy, the revenue math, and when to build versus buy.

July 18, 2026
Developer Guide

What Is an AI Meeting API?

An AI meeting API lets you programmatically create video meetings that an AI participant runs - joins, sees, hears, speaks, pursues goals, and hands back a transcript, recording, and scored analysis. Here's the category, the primitives, and the two-call quickstart.

July 18, 2026
Product

AI Interviewer API: Full Guide

An AI interviewer API lets your product run a live, two way interview where an AI asks the questions, follows up, scores the candidate against a rubric, and hands the recording, transcript, and score back to your own system. Here is the full anatomy, the hiring math, and when to build versus buy.

July 18, 2026
Product

Tavus Alternatives: 6 AI Meeting APIs Compared

Tavus renders a convincing face. It doesn't ship goal scoring, mid-call tool calling, or a results pipeline. Here's an honest look at six alternatives - including ours - and which one actually fits the meeting you're building.

July 18, 2026
Engineering

Build vs Buy: What It Actually Takes to Ship an AI Video Agent on Pipecat + Daily

Pipecat and Daily get you a bot that joins a call and talks back in a weekend. Getting that bot to run a real 35-minute session - without talking over people, forgetting the objective, or losing the recording - is the other 90% of the work. We run this stack in production. Here's the honest bill.

July 18, 2026
Developer Guide

Build an AI Interviewer with the Waterr API

An AI interviewer is four API calls: a persona, a scenario with a scored script, a meeting the candidate joins, and a webhook that hands you the transcript and the scores. No SDK, plain REST. Here's the whole build, end to end, for a real role.

July 18, 2026
Research

Monologue: The Agent Talks to Itself While It Listens

A research preview of Monologue — the reasoning harness inside Waterr's AI meetings. A slot-typed sidecar lets a realtime voice model think while the user speaks: +25% relative on Scale AI's AudioMC, with no added turn latency.

July 15, 2026
Engineering

Full Guide: How to Create AI-Native Video Calls

A practical, opinionated guide to building video calls where AI is a participant — not a notetaker. The four layers (media, voice loop, memory, action), the latency budget, the reference stack, and the hard problems most build posts skip.

June 9, 2026
Thinking

AI-Native Meetings and Video Calls

A meeting used to be a place. Then it was a URL. The next thing it becomes is the first interface where the AI sits across from you, not next to you. A piece on what changes when AI stops being a notetaker and becomes a participant in the loop.

June 8, 2026
Research

Activation Steering for Personality Alignment in Meeting Simulation

A research note on representation engineering — modifying a transformer's internal activations at inference time using sparse autoencoders, contrastive activation addition, and SAE-derived steering vectors — and what the published evidence suggests about applying it to persona alignment in long-horizon meeting simulations.

June 5, 2026
Product

Plus One for Developers

"Quick call?" is the most expensive lie in software. It looks like 15 minutes on a calendar. It actually costs the 90 minutes of context you'd loaded into your head — and the hour afterwards trying to claw it back. Plus One takes the call for you, listens to what your PM, designer, or customer actually needs, and hands you back a brief — plus a prompt ready to drop into Claude Code.

June 2, 2026
Product

Async Video Meetings: The Default Coordination Layer

Async video meetings are the highest-bandwidth way humans transfer context — without forcing everyone into the same 30-minute window. Plus One turns every scheduled call into an async video meeting on your permanent waterr.ai/your-username link.

June 1, 2026
Press Release

Introducing Plus One

Every person gets a personal EA with its own permanent link - waterr.ai/your-username. Share it like an email address. Anyone you allow can open it and jump on a live 1:1 call with your context, anytime, without touching your calendar.

May 26, 2026
Product

Your Personal Harness for a Team of Agents

AI without context is just autocomplete. A unified harness that knows your world — your people, your tools, your patterns — turns a team of agents into an extension of you.

January 23, 2026
Privacy & Trust

AI Meeting Privacy: How Waterr AI Keeps Your Calls Yours

AI meeting privacy is usually an afterthought — the recording, transcript, and analysis end up on someone else's servers by default. Waterr AI is built the other way around: local-first, encrypted, and with a PII shield between your meetings and every AI model that touches them.

September 12, 2025
Research

Video AI Agents: Why the Video Call Is the Next Frontier

A video AI agent isn't a chatbot with a face — it's an AI that sees, listens, and responds inside a real video call. Text gives AI words. Audio gives it tone. Video gives it everything — expression, attention, body language, environment. The companies that ship video AI agents will define the next platform.

July 1, 2025
Product

Build Your World Model — Why a Digital Brain Changes Everything

Your knowledge is scattered across 12 apps, 47 tabs, and hundreds of conversations. A unified digital brain doesn't just organize it — it makes AI actually useful.

May 7, 2025