Neocortex

Neocortex is a character-authoring and integration platform for developers building interactive experiences. It is best suited to game and simulation teams that need to shape NPC behavior as well as connect it to an engine or service. Its breadth is compelling, but usage caps and commercial-use restrictions make the plan tier a core part of the decision.

Overview

A browser-based visual editor brings character personalities, conversation flows, and world dynamics into one authoring environment. Its node-based editor lets creators set character features and rules for interactions with other characters and environments, a practical advantage when behavior design matters as much as dialogue. It is less directly suited to teams seeking only a voice generator or conventional voiceover workflow.

Neocortex’s character feature set includes action systems, spatial awareness, knowledge bases, emotional responses, and multilingual communication. The product is aimed at smart NPCs, AI companions, virtual assistants, VR, voice-controlled games, education and training, and interactive storytelling. The range offers room for varied projects, though the monthly credit allowance and character caps determine how far a given plan can scale.

Key features

• Visual and node-based authoring: Define personalities, flows, features, and interaction rules in a web interface. This supports iterative behavior design without making the editor itself an engine, but larger character rosters require higher plan limits.
• Engine integrations: The maker provides SDKs for Unity, Unreal Engine, and Godot, plus a Web API for other engines and platforms. That flexibility suits projects with different integration targets. Unity’s quick start requires a Neocortex account, Unity 6 (6000.0) or newer, and Git, so Unity teams must meet those prerequisites.
• Web API: The API covers chat and streaming chat, session history, speech and streaming speech, transcription, quizzes, account information, usage, and character listing. This is a broad integration surface for interactive applications, not simply a speech endpoint.
• Voice and privacy: Voice cloning is supported, and audio export is WAV. The privacy policy describes access controls and encryption, including encrypted transmission routes for particularly sensitive personal data. It also describes data-access, correction, deletion, objection, restriction, portability, and consent-withdrawal rights subject to applicable law. Data may be processed or stored worldwide; safeguards such as EU standard contractual clauses are described for certain transfers.

Pricing

Neocortex has a free plan and paid plans billed yearly at the stated monthly rates. Choose based on both project scale and permitted use: Free is personal-use only, Starter permits personal and academic use, while Pro and Team allow commercial use.

• Free — free: 2 characters, 2 conversation flows, 200 monthly credits, 1 API key, and 1 knowledge base file upload, with community support. It is a reasonable personal-use starting point, but the credit and authoring caps leave little headroom for larger projects, and commercial use is not permitted.
• Starter — €9 a month (billed Billed €108 yearly): 5 characters, 5 conversation flows, 2,000 monthly credits, 3 API keys, and 5 knowledge base file uploads, with email support. It fits personal or academic projects needing more room than Free; it does not permit commercial use.
• Pro — €29 a month (billed Billed €348 yearly): 20 characters, 20 conversation flows, 10,000 monthly credits, multi-NPC group chat, 10 API keys, 20 knowledge base file uploads, and 5 custom voices, with email support and commercial use. This is the first listed fit for commercial projects, though teams needing multiple seats or substantially larger quotas will need Team.
• Team — €99 a month (billed Billed €1188 yearly): 5 team member seats, 100 characters, 100 conversation flows, 40,000 monthly credits, multi-NPC group chat, 50 API keys, 100 knowledge base file uploads, and 20 custom voices, with priority support and commercial use. It gives a defined team allowance and much higher caps, but is a substantial step up from Pro.
• Custom — custom pricing: 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 the relevant path for enterprise requirements or uncapped usage rather than a fixed-seat plan.

The yearly billing terms matter: the published monthly amounts correspond to annual totals, rather than a stated month-to-month commitment. Free has no commercial-use permission, so it is not a route to launch a paid product.

Platforms

Neocortex supports Android, iOS, Linux, macOS, Windows, web, API, and self-hosted use. The maker names Unity, Unreal Engine, and Godot SDKs; the Web API is the integration option for other engines and platforms.

Who it's for

Neocortex is a strong candidate for developers and creators building character-led games, VR experiences, interactive stories, training, or virtual assistants, especially when visual behavior authoring and engine integration are both priorities. Academic and personal projects can start on Starter, while commercial teams need Pro or Team. It is a weaker match for commercial experimentation that must remain free, for projects whose credit needs exceed the chosen quota, or for voice work that does not need interactive characters and world behavior.

Pros and cons

Pros

• Visual and node-based tools cover character behavior, flows, and world interactions, not just dialogue.
• Unity, Unreal Engine, and Godot SDKs plus a broad Web API give projects several integration paths.
• Commercial use begins at Pro, which includes multi-NPC group chat and five custom voices.
• Custom offers unlimited usage, self-hosted deployment, and enterprise ownership and compliance options.

Cons

• Free and Starter prohibit commercial use, so a commercial project must budget for Pro or above.
• Free is capped at 200 monthly credits and two characters; even paid plans impose explicit monthly credit and authoring limits unless moving to Custom.
• Team costs €99 a month billed yearly, a notable increase for teams that need its five seats and larger quotas.
• Unity integration requires Unity 6 (6000.0) or newer and Git.
• Data may be processed or stored anywhere in the world, which may not suit organizations with tighter residency requirements.

Alternatives

If the need is broader voice or media generation rather than interactive character behavior, Adobe Firefly has a free plan with limited daily generations and a Standard plan with 2,000 credits per month. For game localization measured in words rather than character behavior, Algebras AI Game Localization Agent offers a free 0–1k words tier and a Standard plan at $15 a month, billed $150 per year, with 15k words/month and 10 concurrent listeners.

For a free open-weight speech model with Apache-licensed weights, Kokoro TTS is the more relevant alternative. For a general voice-reading service, Speechify offers a free tier with 10 voices and 1.5x maximum speed, while Premium is $29 a month, billed monthly, with 60+ languages and 1,000+ voices.

Altered Studio is another alternative. Convai is another alternative. AnnoMotion is another alternative. Cantari is another alternative. Browse Game Voice Generators for more options.

Verdict

Choose Neocortex when your project needs authored character behavior, interactive-world rules, and an integration route into a game engine or API. Its combination of visual tools and engine support is the central reason to choose it; the main reasons to look elsewhere are the annual billing, capped credits and authoring on fixed plans, and the absence of commercial rights on the free and Starter tiers.