We build accessible websites, web apps, and mobile experiences that work for everyone.
153 Base Solutions is a Toronto-based software company. We design, develop, and maintain web products, mobile apps, and AI systems that meet accessibility standards, perform well, and stay secure long after launch.
Third-party certification
Certified supplier, Canadian Aboriginal and Minority Supplier Council.
Measured, not claimed
You can check this yourself.
- 0 axe-core violations, across 35 applicable rules
- 100 Lighthouse accessibility
- 100 Lighthouse performance
- 0.5 s Largest Contentful Paint
Measured on this page with axe-core 4.12.1 and Lighthouse 12.8.2 on 6 August 2026. Run them yourself and see. Read the full accessibility statement
What we build to
Standards, tested and documented.
Accessibility and performance targets are agreed before development starts, then verified before launch.
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WCAG 2.1 AA
Our default conformance target for every interface we deliver.
How we verify this -
EN 301 549
International accessibility requirements for digital products.
How we verify this -
AODA
Ontario accessibility obligations, which reach private businesses too.
How we verify this -
Core Web Vitals
A performance budget set at the start and measured at launch.
How we verify this
Services
What we do.
Engage us end to end, or for a single well-defined piece of work. Both are normal, and the services page has the detail on each.
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Website design & development
Responsive, mobile-first sites built to accessibility and performance criteria agreed up front.
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Web application development
Component-based front ends in React, Next.js, and Vue, with TypeScript throughout.
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Mobile app development
iOS and Android apps built to each platform's conventions, tested with VoiceOver and TalkBack, and released through both stores.
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WordPress & CMS development
Custom themes, plugins, and templates your team can maintain without calling a developer.
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Accessibility audits & remediation
A WCAG audit, a remediation plan ordered by severity and effort, and a conformance report at the end.
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AI engineering
Retrieval assistants, agents and AI features, evaluated against a test set and hosted in Canada.
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Performance & technical SEO
A performance budget agreed at the start and measured at launch, with Core Web Vitals work on real devices.
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Managed hosting & support
Monitoring, backups with tested restores, patching, and incident response under agreed response times.
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Technology consulting
A straight answer on platforms and on whether to rebuild or repair, plus project management across suppliers.
Core offering
AI engineering, hosted in Canada.
Language models are useful when they are grounded in your own material, measured against a test set, and kept inside your own boundary. We build them that way, and we say plainly when a problem does not need one.
What it includes
- Retrieval assistants that answer from your documents, with citations
- Agents that use tools, with human checkpoints and audit logging
- AI features inside an existing product: search, summarising, classification
- Evaluation sets and guardrails, so quality is measured rather than assumed
- Inference hosted in Canada. Your documents are not sent to a US API
What you get: A system you can evaluate, with the test set and the numbers behind it, not a demo that impressed someone once.
About us
A Toronto software company.
153 Base Solutions Inc. is a small, Canadian-owned team building web products for organisations across Canada. We are new as a company, and the people in it are not new to the work.
What it includes
- Canadian-owned and Toronto-based, working with clients across the country
- Small enough that the people who scope your work are the people who build it
- End-to-end delivery, including project management across other suppliers
- Honest about scope: we say no to work we cannot do well
What you get: A supplier you can reach directly, who tells you what is actually going on.
Our commitments
What we put in writing.
We are a new company, so we do not ask you to take our track record on faith. We put the terms in the contract instead.
- Conformance guarantee If what we deliver does not meet the WCAG criteria we agreed, we fix it at no charge. The criteria are written into the scope before work starts, so there is nothing to argue about later.
- One business day Every enquiry gets a reply within one business day, in writing. Support clients get response and resolution targets in the agreement.
- You own everything Code, content, domains and hosting are yours. No proprietary page builder, no licence you have to keep paying us for, no hostage situation if you leave.
- Fixed scope means fixed price A defined project is quoted once. If we get the estimate wrong, that is our problem, not a change order.
Method
How we work.
Five stages, each with named deliverables and a point where you sign off before we continue.
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Discover
Goals, users, constraints, and what's actually broken.
Scope & acceptance criteria -
Design
UX and UI reviewed against accessibility and performance criteria before development begins.
Signed-off designs -
Build
Component-based development with accessibility testing at each merge, not saved for the end.
Staging implementation -
Launch
Migration, redirects, analytics, monitoring, and a documented go-live checklist.
Launch evidence pack -
Support
Patching, backups, monitoring, and enhancements under the agreed response times.
Targets & reporting
Working together
Three ways to engage us.
Most clients start with one and move to another. There's no minimum commitment to begin.
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Fixed scope
Defined project
You know what you need: a new template, a form integration, a specific list of accessibility fixes. Fixed price, fixed timeline.
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End to end
Full build or redesign
Your site or application needs rebuilding rather than patching. Discovery through launch, with staged sign-off.
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Ongoing
Support retainer
Monthly hours covering maintenance, enhancements, and someone who already knows your codebase when something breaks.
Tell us what you're working on.
Whether it's a redesign, an accessibility deadline, or a site nobody has maintained in two years, start with a conversation. We'll tell you honestly whether we're the right fit, and we reply within one business day.