Neocortex

Neocortex is a character-authoring platform that pairs a visual web editor with APIs and game-engine SDKs. It suits developers building interactive characters and worlds, rather than people looking only for voice generation. Its strongest case is the combination of behavior design and integration options; its plan caps and use restrictions make the right tier important.

Overview

The web editor brings character personalities, conversation flows, and world dynamics into a visual workspace. A node-based editor lets creators define character features and rules for interactions between characters and their environments. That makes Neocortex a better fit for experiences where behavior is part of the design than for a conventional voiceover workflow.

Character features include action systems, spatial awareness, knowledge bases, emotional responses, and multilingual communication. Neocortex presents these tools for smart NPCs, AI companions, virtual assistants, VR, voice-controlled games, education and training, and interactive storytelling. The range is useful for projects with several kinds of interaction, but monthly credits and character limits constrain how much a project can grow on lower tiers.

Key features

• Visual character design: Create personalities and conversation flows in a web interface, then use node-based rules to shape interactions. This is valuable when designers need to work directly on behavior, though the number of characters and flows is capped by plan.
• Engine SDKs and Web API: SDKs are provided for Unity, Unreal Engine, and Godot, while the Web API can be used from any engine or platform. The API covers chat, streaming chat, session history, speech, streaming speech, transcription, quizzes, account information, usage, and character listing, giving developers multiple integration paths. The Unity quick start requires a Neocortex account, Unity 6 (6000.0) or above, and Git.
• Character capabilities: Action systems, spatial awareness, knowledge bases, emotional responses, and multilingual communication support more than scripted dialogue. These features make the product relevant to interactive characters, not simply speech output.
• Security and privacy controls: Neocortex uses access controls and encryption, and encrypts transmission routes for particularly sensitive personal data. Its privacy policy describes rights to access, correct, delete, object to, restrict, and port data, and to withdraw consent, subject to applicable law. Data may be processed or stored globally; certain transfers use safeguards such as EU standard contractual clauses.

Pricing

The Free plan costs nothing and allows personal use. It includes 2 characters, 2 conversation flows, 200 monthly credits, 1 API key, 1 knowledge base file upload, and community support. It is a useful starting point for personal projects, but the small quotas and personal-use restriction rule it out for commercial work.

Starter costs €9 a month, billed Billed €108 yearly. It raises the limits to 5 characters, 5 flows, 2,000 monthly credits, 3 API keys, and 5 knowledge base file uploads, with email support. Personal and academic use are allowed, but not commercial use, so the extra capacity does not make it the right choice for a paid product.

Pro costs €29 a month, billed Billed €348 yearly. It includes 20 characters and flows, 10,000 monthly credits, multi-NPC group chat, 10 API keys, 20 knowledge base file uploads, and 5 custom voices. Commercial use and email support are included. This is the first tier suited to commercial projects, with a meaningful increase in capacity over Starter.

Team costs €99 a month, billed Billed €1188 yearly. It adds 5 team member seats, 100 characters and flows, 40,000 monthly credits, multi-NPC group chat, 50 API keys, 100 knowledge base file uploads, 20 custom voices, commercial use, and priority support. The larger quotas and seats suit a small team managing multiple characters or projects.

Custom has custom pricing and offers unlimited characters and usage, custom software and app development, feature roadmap and SDK customization, enterprise data ownership and compliance, self-hosted and private infrastructure deployment, and dedicated partnership with priority support. It is aimed at organizations needing tailored deployment or enterprise requirements rather than a standard plan.

Platforms

Neocortex supports Android, iOS, Linux, macOS, Windows, web, API, and self-hosted use. The mix of client platforms, API access, and engine SDKs gives developers several ways to connect character features to an application.

Who it's for

Neocortex is best suited to game developers, interactive-story creators, and teams building training or simulation experiences that need configurable character behavior and an integration route into an engine or service. Personal and academic creators can start on Free or Starter, while commercial projects need Pro, Team, or Custom. It is a poor fit for someone seeking only a basic voice generator or an unrestricted commercial product on a free tier.

Pros and cons

• Pro: Visual authoring, node-based rules, engine SDKs, and a broad Web API bring behavior design and integration into one product.
• Pro: Character capabilities extend beyond conversation to actions, spatial awareness, knowledge, emotional responses, and multilingual communication.
• Pro: Pro and Team explicitly permit commercial use, and Team provides 5 seats and priority support.
• Con: Free is limited to personal use, with 2 characters, 2 flows, and 200 monthly credits; Starter remains noncommercial despite higher limits.
• Con: The jump to Pro at €29 a month is necessary for commercial use, and its 10,000 monthly credits and 20-character cap may still constrain larger projects.
• Con: The Unity quick start requires Unity 6 or above and Git, which adds prerequisites for that integration path.

Alternatives

For projects centered on character creation and interactive behavior, Neocortex is the more directly aligned choice among these options. Consider Convai instead if its free tier's 100/month Interaction Quota, 60 minutes of cloud-rendered Avatar Studio and Convai Sim, and 1 Character Session Concurrency better match a small trial. For speech-focused work, Kokoro TTS is a free, Apache-licensed open-weight model with 82 million parameters; Speechify offers a free tier with 10 voices and a 1.5x maximum speed; and Altered Studio has a free tier with 3 minutes per month of Voice Morphing, 10,000 AI Tokens, and local voice cloning under an attribution license with noncommercial use restrictions.

Adobe Firefly is another freemium option, with a free plan limited to daily generations. For game localization, Algebras AI Game Localization Agent has a free tier and a Standard plan at $15 a month, billed $150 per year, with 15k words per month and 10 concurrent listeners. AnnoMotion offers a free tier with 15 credits after email verification and 8 free daily credits. Google Cloud Text-to-Speech suits API users looking for usage-priced voice synthesis, with Standard voices priced at US$0.000004 per character and 0 to 4 million characters free. Browse Game Voice Generators for more options in that category.

Verdict

Choose Neocortex for interactive projects where character behavior, visual authoring, and engine or API integration belong together. Its range of character tools is the central reason to choose it; the credit and character ceilings, plus the paid commercial-use threshold, are the main reasons to look elsewhere or budget for Pro and above.