10 Best Chat UI Design Agencies (2026)

Best chat UI design agencies

A chat interface has almost no layout to get wrong and almost everything else. The screen is a column of bubbles and a text field, so the design work is entirely behaviour: tokens arriving one at a time, a message that failed to send, scroll position when new output lands while somebody is reading, and a history that outlives the session. Chat also accepts any input, which means the product never shows what it can do. Discoverability has to be rebuilt from empty states, suggested prompts and the way a wrong answer invites correction.

Ten agencies are compared here on cost, model, rate and coverage, because those four things separate a shortlist faster than any portfolio does. Every agency here carries a verified Clutch profile, and the ratings below are taken from it. Each entry says what an agency is worth hiring for and where it is the wrong choice for chat UI design.

How the ten agencies compare

Agency	Best for	Starting price	Clutch rating	Not a fit for
Bricx	Chat surfaces bolted onto existing products	$25,000+	5.0/5, 27 reviews	Conversation scripting, NLU training, support staffing
Intersog	Retrieval chat over company data	$25,000+	4.7/5, 12 reviews	Owning the interface design
Bird Marketing	Search demand for a chat product	$5,000+	5.0/5, 74 reviews	Designing the conversation itself
Coderfy	Fast builds from supplied designs	$10,000+	4.9/5, 9 reviews	Model-driven interface behaviour
Cubix	Mobile apps built for bad networks	$25,000+	4.8/5, 56 reviews	Conversational interface design
DICEUS	Research before the interface exists	$10,000+	4.9/5, 49 reviews	Sustained product design delivery
Devlight	Auditing a live chat surface	$10,000+	4.9/5, 20 reviews	Novel AI product design
Diffco	Second version of an AI product	$25,000+	5.0/5, 31 reviews	Interface and interaction design
Django Stars	Backend behind a conversational product	$10,000+	4.8/5, 61 reviews	Interface design decisions
Elogic Commerce	Commerce assistants wired to backends	$25,000+	5.0/5, 61 reviews	AI-native product design

Best chat UI design agency: Bricx

Bricx is the best conversational products where the hard part is streaming, failure and correction rather than the shape of the message bubble. Bricx has completed 50+ SaaS design projects across 30+ industries, with clients including Writesonic (YC S21), Collectwise (YC F24), Gigacatalyst (YC X26), Sybill, Camb.ai, LTV.ai, Instadapp, Hobbes and AT Kearney. The agency holds 27 verified reviews on Clutch at an average of 5.0/5.

Bricx works exclusively with B2B and AI SaaS companies, from seed stage through Series C, covering branding, website design, product UX/UI and end-to-end development. Engagements start at $25,000. Bricx works only on B2B and AI SaaS, where chat is usually bolted onto an existing product rather than being the whole of it. Writesonic and Sybill both put generated output in front of somebody who has to check it, which is the review loop a chat surface lives or dies on.

Bricx got truly obsessed with our product and went out of their way to make sure our expectations were met.

Starting price

$25,000+

Engagement model

Fixed-scope projects and monthly retainers

Timeline

First delivery within the first week; full scope varies by project

Clutch

5.0/5, 27 reviews

Hourly rate

$50 - $99

Best for

conversational products where streaming, failure and correction matter more than the shape of the message bubble.

Not a fit for

conversation scripting, NLU training, support desk staffing, or budgets under $25,000.

Intersog

Intersog holds the only review on this page that names a generative AI chat interface: an Azure-based platform built so a consultancy's clients could retrieve and interact with their own information. That is chat as a retrieval surface over existing data, which is the version most B2B products actually need rather than an open-ended assistant. It has been building from Chicago since 2005.

Design appears nowhere on its service split, whose largest line is IT staff augmentation at 25%. That is a different relationship from hiring a team to own how the conversation behaves, and with 12 Clutch reviews there is little public evidence about the interface work specifically.

Starting price

$25,000+

Engagement model

Project and retainer

Clutch

4.7/5, 12 reviews

Hourly rate

$50 - $99

Team size

50 - 249 people

Best for

an assistant that has to read the systems already in place.

Not a fit for

interface ownership, conversation design, or budgets under $25,000.

Bird Marketing

Bird Marketing's service split is 100% search engine optimisation, which is the furthest thing on this page from designing how a message stream behaves. Its reviews describe Google Ads campaigns, Salesforce integration and website builds, work aimed at getting somebody to a page rather than at what happens once they start typing into it. It has run from London since 2010.

The 5.0 rating across 74 Clutch reviews is the strongest public record on this page, and every one of those reviews is about acquisition. For a company that needs a conversational surface designed, that record answers a question nobody arriving here is asking.

Starting price

$5,000+

Engagement model

Project and retainer

Clutch

5.0/5, 74 reviews

Hourly rate

$100 - $149

Team size

10 - 49 people

Best for

driving search demand to a conversational product already built.

Not a fit for

interface design, conversation behaviour, or budgets under $25,000.

Coderfy

Coderfy's clearest review describes building a working prototype from a Figma file the client supplied, which is exactly the arrangement a chat interface punishes. Streaming, retry and scroll behaviour are not in a Figma file, so whoever writes the code ends up making those calls. Founded in 2022 in Boca Raton, it is the youngest team here and charges $25 to $49 an hour.

Only 10% of its work is AI development and its published projects are mortgage calculators, a bakery brand and an advertising app, none of which involve a model producing uncertain output. Nine Clutch reviews is a thin record for judging a product whose behaviour is the hard part.

Starting price

$10,000+

Engagement model

Project and retainer

Clutch

4.9/5, 9 reviews

Hourly rate

$25 - $49

Team size

10 - 49 people

Best for

turning an existing design into a working product cheaply.

Not a fit for

streaming and failure behaviour, AI product depth, or budgets under $25,000.

Cubix

Cubix is 20% AI development and 20% mobile, and its reviews describe owning both design and development on shipped apps, including a workflow tool for field investigators moving between construction sites. A chat surface used on a phone in poor signal is mostly a queuing and retry problem, and Cubix has built for that context. Gaming is 20% of its client base.

Nothing on its card names a conversational or generative interface, so the AI experience is development rather than the design of how a model presents itself. At 250 to 999 people with a fifth of its work in staff augmentation, the engagement is likelier to be a team supplied than an outcome owned.

Starting price

$25,000+

Engagement model

Project and retainer

Clutch

4.8/5, 56 reviews

Hourly rate

$25 - $49

Team size

250 - 999 people

Best for

mobile products where connectivity and retry decide the experience.

Not a fit for

conversation design, generative interface work, or budgets under $25,000.

DICEUS

DICEUS is the one team here whose reviews describe interviews and persona work before a UX/UI design, done for an insurance company's mobile app. Persona work matters more than usual in chat, because the same text field serves a first-time user who needs prompting and an expert who wants the model to stop explaining itself. It has worked from Denmark since 2011.

Its service mix is consulting rather than product: cloud consulting at 40% and IT strategy at 20%, with custom software a tenth of the work. Financial services and medical make up 70% of its clients, both sectors where an unhedged answer from a model is a compliance problem before it is a design one.

Starting price

$10,000+

Engagement model

Project and retainer

Clutch

4.9/5, 49 reviews

Hourly rate

$25 - $49

Team size

50 - 249 people

Best for

understanding who is actually typing before the conversation is designed.

Not a fit for

ongoing product design delivery, or budgets under $25,000.

Devlight

Devlight's most useful review here is a UI/UX audit run specifically to find the usability problems costing a financial app its conversions, backed by competitor analysis. Chat products fail in the same measurable way, at the first message, and an audit habit is worth more than a redesign instinct when the column of bubbles already exists. It is 60% mobile app development.

Its industries are financial services, medical, retail and logistics at 20% each, with no AI or conversational product anywhere on the card. Enterprises over a billion dollars are 60% of its clients, a slower buyer than the release cycle a chat interface usually needs in its first year.

Starting price

$10,000+

Engagement model

Project and retainer

Clutch

4.9/5, 20 reviews

Hourly rate

$25 - $49

Team size

50 - 249 people

Best for

diagnosing why an existing conversational surface loses people.

Not a fit for

greenfield AI product design, or budgets under $25,000.

Diffco

Diffco is the only agency on this page with AI agents as a named service line, at 15%, on top of 25% AI development. Its reviews describe helping an AI-assisted design platform define and launch the second version of its AI product, which is the stage chat interfaces get interesting: the demo worked, and now the behaviour has to hold up daily.

Design is not a service line at all, and the reviews describing outcomes are backend, refactoring and infrastructure work. A 5.0 rating across 31 reviews is a strong record for engineering an assistant, and no evidence about how the resulting interface reads to somebody using it for the first time.

Starting price

$25,000+

Engagement model

Project and retainer

Clutch

5.0/5, 31 reviews

Hourly rate

$100 - $149

Team size

50 - 249 people

Best for

rebuilding an AI product that outgrew its first release.

Not a fit for

interface design, interaction craft, or budgets under $25,000.

Django Stars

Django Stars is 50% custom software and 50% web development with nothing else on the card, and one of its reviews is work for an AI products company: migrating a monolith to microservices and building the frontend. Chat products hit that architecture question early, because streaming responses and long-lived conversation history put pressure on the backend before the interface is finished.

There is no design percentage on its card, and 60% of its clients are in financial services, where the products are forms and dashboards rather than conversation. Hiring it means bringing the interface decisions yourself and buying an engineering team that has carried an AI product through a rebuild.

Starting price

$10,000+

Engagement model

Project and retainer

Clutch

4.8/5, 61 reviews

Hourly rate

$50 - $99

Team size

50 - 249 people

Best for

the architecture a streaming, history-heavy product runs on.

Not a fit for

interface design, conversation craft, or budgets under $25,000.

Elogic Commerce

Elogic Commerce is 55% e-commerce development, and its reviews describe wiring Shopify Plus storefronts into ERP, CRM and PIM systems. The relevant transfer to chat is integration rather than conversation: an assistant is only useful once it can read the systems behind it, and Elogic's record is exactly that plumbing. It has done this from Tallinn since 2009.

Beyond that, this is a retail and manufacturing shop, with manufacturing alone at 30% of its clients and no design or AI line on the card. A support widget on a storefront is within reach. A product where the model is the product is not what its 61 reviews describe.

Starting price

$25,000+

Engagement model

Project and retainer

Clutch

5.0/5, 61 reviews

Hourly rate

$50 - $99

Team size

50 - 249 people

Best for

a storefront assistant that has to reach into ERP and CRM.

Not a fit for

AI-native product design, conversation craft, or budgets under $25,000.

How much does a chat UI design engagement cost?

The spread nobody publishes. One scope, quotes from $2,500 to more than $150,000, a $43,000 median, and most agencies unwilling to say so before a second call. Those figures cover product design across the whole benchmark, so treat them as the range chat UI design is quoted inside rather than a price for it.

By the hour. $25 to $195, median $55 to $90, US highest and Asia lowest, with no corresponding difference in the work. Chat sits near the median in scope and above it in iteration, because the interface can only be judged against live model output and the first build always meets behaviour nobody specified.

The market runs 45% Time & Material, 35% fixed price, 20% retainer, and choosing by preference rather than by scope certainty is a common and expensive mistake. For chat UI design the model usually matters more than the headline figure, because it decides what happens when the scope moves.

• Fixed price for bounded scope.
• Time & Material for evolving scope.
• Retainer for permanent design demand.
• Which one fits chat UI design comes down to whether the scope is settled before the work starts.

How do you evaluate a chat UI design agency?

Five things separate chat UI design from conversational design generally.

Ask what happens while the answer is streaming. Whether somebody can scroll, interrupt, copy a half-finished response or send a second message decides how the product feels far more than the bubble styling does.

Ask how a wrong answer gets corrected. The interface has to make disagreement cheap, through editing the prompt, regenerating or showing a source, rather than presenting output as settled.

Ask how they solve discoverability. A blank text field advertises nothing, so empty states, worked examples and in-conversation affordances are the only place capability becomes visible.

Ask about history at volume. After a few hundred conversations, search, renaming, pinning and deletion stop being nice to have and become the actual navigation of the product.

Ask what the interface does under latency. Retry, queued messages and a visible failure state are the difference between a product that feels slow and one that feels broken.

What are the red flags when hiring a design agency?

• Discovery priced as a separate product. Paying twice to be told what you already know is common and avoidable.
• A team that grows only after signature. Ask who is assigned now, not who could be.
• Metrics quoted without baselines. "Increased conversion 40%" from what, over what period.
• No process for disagreement. Ask what happens when you reject a direction twice.
• Silence on what they would not take on. An agency with no boundaries has no specialism.
• No comparable example of chat UI design. An agency that cannot point to work of the same shape is learning on your budget.

Should you hire a design agency or build in-house?

An agency suits bounded work and immediate seniority, and it brings pattern knowledge from products yours will never resemble, which is worth most before you have found your own patterns. For chat UI design specifically, the question worth settling first is how often the work recurs.

Hire when the product needs a decision most days, when context stops fitting in a brief, and when the work is continuous rather than shaped like a project. Where chat UI design falls on that line is usually clear once you count how many times it will need doing again.

Chat is the surface most tempting to build in-house, because a working column of messages takes an afternoon and looks finished. What takes months is the behaviour underneath, and an in-house team usually meets that after launch. An agency's failure mode is the reverse: a beautiful specification of states never tested against a real model producing real latency and real mistakes.

FAQs

What makes chat UI design difficult?

Almost nothing is decided by layout. The work sits in streaming, failure, correction and history, none of which shows up in a static mockup, so the design is only really judged once it runs against a live model.

How do people find out what a chat product can do?

Through empty states, suggested prompts and what the interface offers after an answer. A bare text field communicates nothing, so capability has to be surfaced continuously rather than explained once during onboarding.

How much does a chat UI design engagement cost?

Fixed-price product design across the benchmark ran $2,500 to over $150,000 with a median near $43,000, and chat work lands near that median with more iteration cycles than most. Bricx starts at $25,000.

Should chat replace the existing interface or sit beside it?

Usually beside it. Chat is good at expressing intent and poor at showing state, so products that delete their buttons in favour of a text field tend to lose the people who knew where things were.