Top 10+ C# Development Companies in Silicon Valley | C# Developers Silicon Valley 2026

Last Updated 31st October 2026 | Category: Top Web Development Firms

As of October 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 37% report a team of 50 or more. Most frequently listed specialties here include Mobile App Development, Web Development, AI Development, and Bot 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 36% 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
36%
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 4.7 7 $50 - $99 / hr 2 - 9 2004 Murfreesboro, TN Visit Profile
3 4.6 7 $100 - $149 / hr 10 - 49 2010 Auburn, AL Visit Profile
4 4.6 6 Undisclosed 10 - 49 N/A Wilder, ID Visit Profile
5
4.4 8 $100 - $149 / hr 2 - 9 2008 — Visit Profile
6 4.3 8 $100 - $149 / hr 10 - 49 2012 Austin, TX Visit Profile
7 4.2 6 N/A N/A N/A — Visit Profile
8
4.1 8 $150 - $199 / hr 50 - 249 2005 — Visit Profile
9 — — $150 - $199 / hr 50 - 249 2010 — Visit Profile
10 4.4 9 $100 - $149 / hr 10 - 49 1996 — Visit Profile

The List of Top 10+ C# Development Companies in Silicon Valley | Top C# Developers Silicon Valley October 2026

Sponsored
2011
< $25
1000+
$2,500,000+
Web Development Web Design PHP Development WordPress Development AngularJS Development
2004
$50 - $99
2 - 9
$5,000,000+
Web Development Web Design Mobile App Development UI/UX Design
N/A
N/A
N/A
$2,500,000+
Web Development Web Design Mobile App Development UI/UX Design Custom Software Development
2014
$25 - $49
10 - 49
$50,000+
Custom Software Development E-commerce Development Enterprise App Development Mobile App Development Web Development
2007
N/A
N/A
$5,000,000+
Web Development Web Design UI/UX Design CMS Development
2010
$150 - $199
10 - 49
$10,000+
Branding Content Management System Custom Software Development Mobile App Development UI-UX Design Wearable App Development
2002
$25 - $49
250 - 999
$10,000+
Custom Software Development Mobile App Development UI-UX Design Web Development
4.8 6 Reviews
2000
$25 - $49
50 - 249
$100,000+
Web Development Web Design PHP Development Mobile App Development Custom Software Development
1995
$100 - $149
250 - 999
$25,000+
Android App Development iOS App Development iPhone App Development Mobile App Development UI-UX Design
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
2008
$150 - $199
10 - 49
$100,000+
Web Development Web Design Mobile App Development CMS 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
1997
$150 - $199
10 - 49
$25,000+
Content Management System E-commerce Development Mobile App Development SEO Social Media Marketing Web Design Web Development
2002
$25 - $49
1,000 - 9,999
$10,000+
Custom Software Development Mobile App Development Web Development
2009
$50 - $99
10 - 49
$10,000+
Android App Development Digital Strategy Enterprise App Modernization iOS App Development iPhone App Development Mobile App Development UI-UX Design Web Design 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
2006
$100 - $149
50 - 249
$50,000+
Custom Software Development Internet of Things Mobile App Development UI-UX Design Web Design Web 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
2008
$150 - $199
50 - 249
$100,000+
Web Development Web Design Mobile App Development UI/UX Design Custom Software Development AR App Development
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Top Companies in Silicon Valley

Top Mobile App Development Companies In Silicon Valley
FAQ

Frequently Asked Questions

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

The gap usually shows up after the contract is signed, not before. A merely competent Web Development company in Silicon Valley builds what's in the spec; a genuinely great one pushes back when the spec is wrong, flags a scaling problem before it becomes expensive, and treats your product like something they have a stake in. That difference rarely shows up in a sales pitch — it shows up in how a firm's past clients talk about working with them months after launch.

It does, in fairly practical ways — communication style, how formally decisions get escalated, and the pace at which changes get approved all vary by region, and Silicon Valley has its own norms around each. None of this is a problem as long as expectations are set early; the Web Development engagements that go smoothly in Silicon Valley are usually the ones where the client spent a little time upfront understanding how the team likes to work, not just what they can build.

Listings for Web Development companies in Silicon Valley update continuously as new reviews come in, with a more thorough re-ranking pass every few months. That means a firm coasting on an old reputation without fresh client feedback will gradually slide, while newer companies with strong recent delivery can move up — the goal is that the Silicon Valley list reflects how firms are performing now, not two years ago.

A verified badge on a Web Development company's Silicon Valley 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.

Skip past the summary and go straight to the portfolio examples, the full text of client reviews (not just the star rating), and how long the company has been operating. Reviews that mention specific, measurable results — a faster checkout flow, a successful migration, fewer support tickets — tell you far more than generic praise. It's also worth checking whether the Web Development firm in Silicon Valley responds to reviews at all, since that habit tends to mirror how they handle feedback during an actual project.

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 Silicon Valley are a bigger red flag than a slightly higher quote.

Listen to what they ask about before they start talking solutions. A Web Development company in Silicon Valley genuinely focused on outcomes will want to understand your users, your revenue model, and your competitors before proposing anything technical. One that jumps straight to a timeline and a quote without asking those questions is optimizing for winning the deal, not for whether the thing they build actually works for your business.

The highest-rated Web Development companies in Silicon Valley usually earn that position through a combination of solid technical delivery and genuinely good communication — the two rarely show up separately in strong reviews. Look past the aggregate star rating and read a handful of full reviews; specific, detailed praise about how a project actually went is a far better signal of which Web Development company in Silicon Valley will be a good fit than a number alone.

Start by filtering for Web Development companies in Silicon Valley with direct experience in your vertical — a firm that has already built for healthcare, fintech, or retail will already understand the compliance rules and user expectations that come with it, instead of learning them on your project. Ask for case studies specific to your industry, and where possible, talk to a client from the same sector to confirm the experience is as deep as the portfolio suggests.
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