Most "AI avatar generator" searches turn up tools built to render a scripted video once and export it. That's a different product from one that sits on your website and holds an actual back-and-forth conversation with a visitor. If you need the second thing, here's how the platforms that actually do it compare.
Why "real-time" is a different category than "avatar video"
Most AI avatar tools fall into one of two buckets. Scripted video generators take a script or document, render a finished avatar video, and hand you a file to publish. Real-time platforms instead stream a live avatar that listens, reasons, and responds on the spot, the way a support rep would. The two categories share a name but solve different problems: one produces marketing assets, the other staffs a conversation.
This matters when you're picking a tool, because a platform built for the first job usually can't do the second job well even if its marketing page mentions "interactive" avatars. Below are four platforms genuinely built for real-time, conversational avatar deployment, plus where two well-known video-generation platforms fit if that's actually what you need instead.
Four real-time avatar platforms compared
1. New Port AI (Live Chat Avatar / FaceMarket)
New Port AI's Live Chat Avatar runs on FaceMarket and is built specifically around live, embeddable conversation rather than video export. You choose or upload an avatar, set its persona, pick from four real-time conversational models, load a knowledge base, and publish with an SDK or iframe embed that drops onto a website, app, or kiosk.
Best for: Websites, apps, and event kiosks that need a live, embeddable conversational avatar
Key feature: Real-time video with lip sync under 600 milliseconds of latency; four selectable models (Gemini 3.1 Flash Live, Gemini 2.5 Flash Live, Azure-realtime, GPT-5.5)
Pricing: Free (30 min/month, 1 avatar), Professional $49/month (300 min, 5 avatars), Premium $259/month (2,000 min, unlimited session duration)
Limitation: Smaller public avatar marketplace than HeyGen's, since the platform leans toward custom-built avatars over browsing a large stock library
2. D-ID
D-ID pairs its Creative Reality Studio video tool with a real-time streaming API aimed at enterprise deployment. It's one of the few platforms that leads with compliance credentials alongside the conversational feature set.
Best for: Enterprise teams that need compliance certifications alongside real-time conversation
Key feature: Real-time streaming API delivering up to 100 frames per second, with retrieval-augmented generation for context-aware answers, in 120+ languages
Pricing: Free 14-day trial; tiered plans start at $5.90/month (Creative Reality Studio tier)
Limitation: Entry-level pricing covers the video-creation tool; real-time streaming Agents are positioned as a separate, higher enterprise tier
3. HeyGen
HeyGen is primarily built around generating scripted, one-way avatar videos at scale rather than live back-and-forth conversation. It's included here because it comes up in nearly every "AI avatar" search and is worth ruling in or out explicitly.
Best for: Marketing teams producing scripted avatar videos and localized video content at scale
Key feature: 1,100+ stock avatar library across 175+ languages and dialects, with voice cloningPricing
Free plan: 3 videos/month, 3-minute max, watermarked. Paid from $24/month (Creator, billed annually)
Limitation: Built for one-way scripted video rather than live, real-time conversation
4. Synthesia
Synthesia targets structured corporate training and internal communications, with a slide-based editor and LMS export rather than a live-chat interface.
Best for: Corporate training and learning & development teams needing structured, LMS-ready video.
Key feature: 240+ stock avatars, 160+ languages, SCORM export for LMS integration.
Pricing: Starter plan from $19/month.
Limitation: Focused on structured, one-way training content rather than real-time conversational interaction.
Comparison table
Note that HeyGen's and Synthesia's own published feature sets don't describe live, back-and-forth conversation as a core capability; both are included above because they're common search comparisons for "AI avatar," not because they compete directly on real-time deployment.
How to choose
I need an avatar embedded on my own website or app that visitors can actually talk to.
New Port AI or D-ID. Both are built around real-time streaming rather than video export, so the avatar responds to whatever the visitor asks instead of playing a fixed script.
I need enterprise compliance certifications before I can deploy anything. D-ID leads with published SOC 2 and ISO 27001/27017/27018/27701 certifications alongside its real-time API, which matters if security review is a gating step in your rollout.
I need to produce scripted marketing or training videos, not live chat. HeyGen for marketing-style scripted videos at volume, Synthesia for structured training content with LMS export. Neither is the right tool if the goal is a live, embeddable conversation.
I need the avatar to answer from my own documentation, not a fixed script. New Port AI's Live Chat Avatar loads a knowledge base directly and answers from it in real time, which is a different workflow than writing a script for a rendered video.
I want to test a real-time avatar without committing budget upfront. New Port AI's Free tier gives 30 minutes of live avatar time every month on an ongoing basis, not a one-time trial credit that runs out. That's enough to build and test a full Profile/Abilities/Knowledge setup before deciding whether to upgrade to the $49/month Professional tier for higher concurrency and longer sessions.
Where New Port AI fits
Live Chat Avatar is New Port AI's answer to the specific "real-time, embeddable, knowledge-grounded" use case:
Website sales agents that hold a live conversation instead of routing visitors through a static FAQ page.
24/7 support agents that answer from an uploaded knowledge base and stay available outside business hours.
Event kiosk assistants, the same setup deployed at New Port AI's own booth 187 at NVIDIA GTC 2026.
Start building with New Port AI
If what you actually need is a live conversation, not another rendered video file, Live Chat Avatar is built for exactly that from the ground up.
FAQ
What's the difference between a live chat avatar and a scripted avatar video platform like HeyGen or Synthesia?
A live chat avatar streams in real time and generates a new response to whatever a visitor asks. A scripted avatar video platform renders a fixed video from a script or document once, and that same file plays back identically every time. HeyGen and Synthesia are built around the second model; New Port AI and D-ID are built around the first.
How much does a real-time AI avatar platform cost?
New Port AI's Live Chat Avatar has a Free tier (30 minutes/month, 1 avatar), a Professional tier at $49/month (300 minutes, 5 avatars, 4 concurrent sessions), and a Premium tier at $259/month (2,000 minutes, unlimited session duration, 6 concurrent sessions). D-ID's entry Creative Reality Studio tier starts at $5.90/month, though real-time streaming Agents sit in a separate enterprise tier. HeyGen starts at $24/month and Synthesia at $19/month for their video-generation plans.
How do I get started building a live chat avatar?
On FaceMarket, choose or upload an avatar, set its persona in the Profile tab, pick a real-time model and voice in the Abilities tab, load your knowledge base, and publish with an SDK or iframe embed.
Can HeyGen or Synthesia avatars hold a live conversation?
Based on their own published feature sets, both are built around one-way, scripted video generation rather than live conversational interaction. Neither publicly lists a real-time conversational API as a core product feature the way New Port AI and D-ID do.
Which platform has the most avatar and language options?
HeyGen publishes the largest library among the platforms compared here, at 1,100+ stock avatars across 175+ languages. That library size comes with the tradeoff of being built for scripted video rather than live conversation.
Which platform has published enterprise security certifications?
D-ID publicly lists SOC 2 certification along with ISO 27001, 27017, 27018, and 27701 compliance. Check directly with each vendor for their current certification status before a compliance-gated deployment.
Is there a free trial for any of these platforms?
New Port AI's Live Chat Avatar Free tier gives 30 minutes of live avatar time every month on an ongoing basis, not a one-time trial that expires. D-ID offers a free 14-day trial. HeyGen offers a free plan with 3 videos per month at a 3-minute maximum, watermarked. Synthesia offers a free trial capped at 3 minutes of video.
What's the biggest limitation of a real-time avatar platform compared to a video-generation platform?
Real-time platforms generally offer a smaller browsable stock avatar library, since the product is built around custom avatars and live conversation quality rather than a large template catalog. If your primary need is a big library of ready-made presenter styles for one-way videos, a video-generation platform may fit better.
