Top 10+ C# Development Companies in Washington D.C. (2026)

Last Updated 04th November 2026 | Category: Top Web Development Firms

As of November 2026, this directory tracks 58 c-sharp companies. Hyperlink InfoSystem currently sits at the top of the list (5.0-star average from 497 verified reviews, $25 - $49 / hr, in business since 2011). Looking at the group as a whole, the midpoint hourly rate is $125, the median rating is 4.8, and 38% report a team of 50 or more. Most frequently listed specialties here include Mobile App Development, Web Development, Bot Development, and AI Development.

Every company on this page is evaluated on the same real signals: how clients have rated their work, what they charge per hour, how big their team is, and how long they've been in business. Clients rate these c-sharp firms 4.9/5 on average. $100 - $149 / hr is the most common rate band. Roughly 38% of the companies listed report a headcount of 50 or more. Before reaching out to any shortlisted firm, it's worth cross-checking its review history and portfolio directly - every listing is manually checked (founding year, services, team size) and reviews go through a moderation step before they go live.

58
Verified Firms
$100 - $149 / hr
Most Common Rate
4.9
Average Rating
38%
Have 50+ Employees
How this list is built: Companies are added only after manual research into their foundation year, service offerings, ratings, and employee strength. Client reviews go through a verification step before being marked Verified and shown publicly. Listings marked Sponsored pay for premium placement — sponsorship does not affect star ratings or review content.

Top-Ranked c-sharp Companies

Compare the highest-ranked firms first side by side.

Rank Company Rating Reviews Hourly Rate Team Size Founded Headquarters Action
1 5.0 497 $25 - $49 / hr 1,000 - 9,999 2011 Jersey City, NJ Visit Profile
2 4.8 7 $100 - $149 / hr 10 - 49 1996 — Visit Profile
3
4.4 8 $150 - $199 / hr 10 - 49 2008 Chicago, IL Visit Profile
4 4.3 6 Undisclosed 50 - 249 1999 Miami, FL Visit Profile
5 4.8 10 $100 - $149 / hr 10 - 49 2005 Wichita, KS Visit Profile
6 4.3 10 $100 - $149 / hr 10 - 49 2010 — Visit Profile
7 4.3 10 $150 - $199 / hr 2 - 9 2014 — Visit Profile
8 4.1 10 $50 - $99 / hr 50 - 249 1999 — Visit Profile
9 — — $150 - $199 / hr 10 - 49 2008 — Visit Profile
10 4.3 9 $100 - $149 / hr 50 - 249 1996 — Visit Profile

The List of Top 10+ C# Development Companies in Washington D.C. | Top C# Developers Washington D.C. November 2026

4.7 8 Reviews
2012
$100 - $149
10 - 49
$2,500,000+
Web Development Web Design Mobile App Development UI/UX Design Custom Software Development
2010
$150 - $199
10 - 49
$10,000+
Branding Content Management System Custom Software Development Mobile App Development UI-UX Design Wearable App Development
2003
$150 - $199
10 - 49
$10,000+
Web Development Web Design PHP Development Node.js Development Mobile App Development UI/UX Design
2009
$50 - $99
50 - 249
$10,000+
Content Management System E-commerce Development Mobile App Development SEO Web Development
2011
$50 - $99
10 - 49
$2,500,000+
Android App Development Custom Software Development E-commerce Development iOS App Development Mobile App Development Web Development
1999
$50 - $99
50 - 249
$100,000+
Web Development Web Design PHP Development WordPress Development E-Commerce Custom Software Development
2013
$25 - $49
50 - 249
$25,000+
Blockchain Development Content Management System Custom Software Development Mobile App Development UI-UX Design Web Design Web Development
1994
Undisclosed
10 - 49
$2,500,000+
Custom Software Development Mobile App Development Web Design Web Development
2014
$100 - $149
2 - 9
$25,000+
Chat Bots & AI Development Custom Software Development Digital Strategy E-commerce Development Mobile App Development UI-UX Design Web Design Web Development
1997
$150 - $199
50 - 249
$5,000,000+
Cloud Solutions Custom Software Development E-commerce Development Enterprise App Modernization Mobile App Development UI-UX Design Web Design Web Development
1996
$100 - $149
10 - 49
$5,000,000+
Web Development Web Design Mobile App Development
2015
$25 - $49
50 - 249
$50,000+
Android App Development E-commerce Development Internet Marketing Mobile App Development SEO Social Media Marketing UI-UX Design Web Design Web Development
2008
$150 - $199
10 - 49
$5,000,000+
Web Development Web Design Mobile App Development UI/UX Design Custom Software Development CMS Development Ruby on Rails
N/A
N/A
N/A
$2,500,000+
Web Development Web Design Mobile App Development UI/UX Design
2010
$100 - $149
2 - 9
$50,000+
Web Development Web Design PHP Development WordPress Development UI/UX Design Custom Software Development Ruby on Rails
2002
$25 - $49
1,000 - 9,999
$10,000+
Custom Software Development Mobile App Development Web Development
2014
$150 - $199
2 - 9
$100,000+
Web Development Web Design WordPress Development MySQL Drupal Mobile App Development UI/UX Design CMS Development
1997
$100 - $149
10 - 49
$2,500,000+
Web Development Web Design Mobile App Development
2000
$25 - $49
250 - 999
$2,500,000+
Big Data Cloud Computing Software Enterprise App Development Internet of Things Mobile App Development UI-UX Design
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FAQ

Frequently Asked Questions

Got questions about our specialized technology solutions? We have the answers to help you make informed decisions.

Put the same short brief in front of every Web Development company in Washington DC you're considering, and compare not just their quotes but how each one interprets the brief — what questions they ask, what risks they flag, what they'd do differently. Price and timeline matter, but they mean little without knowing whether the firm actually understood the problem. Calling one or two of each company's past clients directly usually tells you more in ten minutes than another round of proposals would.

Working with a Web Development company in Washington DC usually comes down to a straightforward trade: strong technical talent at a price point that's hard to match in higher-cost markets, without the coordination overhead of a fully remote, no-local-presence vendor. Teams based in Washington DC tend to understand both the practicalities of international client work and the local hiring market, which shows up in smoother onboarding and fewer surprises around contracts and invoicing.

There's no single number here — a Web Development company in Washington DC might quote a few thousand dollars for a narrow, well-defined build and a much larger figure for a full product with integrations and ongoing support. The only way to get a real answer for your situation is to send the same brief to a handful of Web Development firms in Washington DC and compare the itemized breakdowns, not just the bottom-line total.

Value from a Web Development company in Washington DC comes less from the rate you negotiate and more from whether the team understands the business problem behind the build. Firms that ask about your actual goals before proposing a solution, and that stick around to look at usage data after launch, tend to produce work that pays for itself. A Web Development partner in Washington DC chasing the lowest quote rarely correlates with the best long-term outcome.

Yes — you can filter Web Development companies in Washington DC by budget range, hourly rate, team size, and area of specialization before reaching out to anyone. Pairing those filters with review scores usually gets you to a realistic shortlist in a few minutes instead of manually working through every listing in the category.

A verified badge on a Web Development company's Washington DC profile means the platform has confirmed the firm's identity and business registration, and has spoken directly with at least some of the clients referenced in their portfolio. It doesn't guarantee a perfect fit for your project, but it does rule out the more obvious risk of an unvetted or misrepresented listing — worth prioritizing over unverified entries when the choice is close.

Get clear, specific answers on: who owns the code once it's delivered, what the support window looks like after launch, how they handle a team member leaving mid-project, and what their process is when a client requests a scope change. Vague or evasive answers to any of these from a Web Development company in Washington DC are a bigger red flag than a slightly higher quote.

It depends on your business goals, but a Web Development company in Washington DC that's serious about outcomes will tie their KPIs to yours — activation rate, feature adoption, conversion, churn, revenue per user — rather than reporting on generic delivery metrics like story points closed. Get analytics wired in from the start so there's a real feedback loop between what gets built and what actually moves the business, and agree on which numbers matter before the project kicks off.
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