Top 10+ Cross Platform App Development Companies in Seattle, WA | Cross Platform App Developers Seattle 2026
Last Updated 05th September 2026 | Category: Top App Development FirmsThe List of Top 10+ Cross Platform App Development Companies In Seattle, Washington | Top Cross Platform App Developers Seattle, WA September 2026
1. Hyperlink InfoSystem
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Details
| Founded: | 2011 |
|---|---|
| Hourly Rates: | < $25 |
| Employees: | 1000+ |
| Avg. Project Cost: | $100,000+ |
| Ratings: |
5.0
497 Reviews
|
Since 2011, Hyperlink InfoSystem has operated as a technology services provider. Hyperlink InfoSystem focuses on Mobile App Development. Hyperlink InfoSystem employs 1000+ people. Clients can expect pricing around < $25/hr, with projects averaging about $100,000. Overall, Hyperlink InfoSystem is one of the options worth shortlisting for a technology project.
Details
| Founded: | 2008 |
|---|---|
| Hourly Rates: | $25 - $49 |
| Employees: | 50 - 249 |
| Avg. Project Cost: | $5,000,000+ |
| Ratings: |
4.3
7 Reviews
|
SolbegSoft has been in business since 2008, delivering technology projects for clients. SolbegSoft focuses on Mobile App Development. The company operates with a team of 50 - 249 professionals. Typical hourly rates run around $25 - $49/hr, with an average project cost near $10,000. These details offer a useful starting point when evaluating SolbegSoft.
Details
| Founded: | 2001 |
|---|---|
| Hourly Rates: | N/A |
| Employees: | 1000+ |
| Avg. Project Cost: | $50,000+ |
| Ratings: |
4.6
6 Reviews
|
Since 2001, Zensar Technologies has operated as a technology services provider. Their core services include Mobile App Development and Custom Software Development. The company operates with a team of 1000+ professionals. The average project on record costs around $5,000,000. This profile is a starting point — reach out to Zensar Technologies directly to discuss project specifics.
Details
| Founded: | 2000 |
|---|---|
| Hourly Rates: | $100 - $149 |
| Employees: | 10 - 49 |
| Avg. Project Cost: | $50,000+ |
| Ratings: |
4.6
6 Reviews
|
NEXTFLY Web Design works with clients to plan, build, and ship digital products. The company's main offerings are Web Development and Mobile App Development. With 10 - 49 people on staff, NEXTFLY Web Design can take on projects of varying size. Clients can expect pricing around $100 - $149/hr, with projects averaging about $100,000. Overall, NEXTFLY Web Design is one of the options worth shortlisting for a technology project.
Details
| Founded: | 2008 |
|---|---|
| Hourly Rates: | $100 - $149 |
| Employees: | 50 - 249 |
| Avg. Project Cost: | $25,000+ |
| Ratings: |
4.2
7 Reviews
|
ChaiOne is a software development company that turns ideas into working products. ChaiOne focuses on Web Development and Mobile App Development. ChaiOne employs 50 - 249 people. Typical hourly rates run around $100 - $149/hr, with an average project cost near $2,500,000. Overall, ChaiOne is one of the options worth shortlisting for a technology project.
Details
| Founded: | 2015 |
|---|---|
| Hourly Rates: | $50 - $99 |
| Employees: | 10 - 49 |
| Avg. Project Cost: | $10,000+ |
| Ratings: |
4.2
6 Reviews
|
Since 2015, ONLINICO has operated as a technology services provider. Their core services include QA & Software Testing. With 10 - 49 people on staff, ONLINICO can take on projects of varying size. Typical hourly rates run around $50 - $99/hr, with an average project cost near $25,000. This gives a quick snapshot of what to expect when working with ONLINICO.
Details
| Founded: | 2004 |
|---|---|
| Hourly Rates: | $150 - $199 |
| Employees: | 10 - 49 |
| Avg. Project Cost: | $25,000+ |
| Ratings: |
4.1
6 Reviews
|
Since 2004, Treeline Interactive has operated as a technology services provider. Treeline Interactive focuses on Custom Software Development. The company operates with a team of 10 - 49 professionals. Clients can expect pricing around $150 - $199/hr, with projects averaging about $2,500,000. Overall, Treeline Interactive is one of the options worth shortlisting for a technology project.
Details
| Founded: | 2001 |
|---|---|
| Hourly Rates: | $150 - $199 |
| Employees: | 10 - 49 |
| Avg. Project Cost: | $25,000+ |
| Ratings: | No reviews yet |
JLOOP is a technology company founded in 2001. JLOOP focuses on Web Development and Mobile App Development. JLOOP employs 10 - 49 people. Clients can expect pricing around $150 - $199/hr, with projects averaging about $100,000. These details offer a useful starting point when evaluating JLOOP.
Details
| Founded: | 2013 |
|---|---|
| Hourly Rates: | $25 - $49 |
| Employees: | 2 - 9 |
| Avg. Project Cost: | $50,000+ |
| Ratings: |
4.2
8 Reviews
|
Woopa works with clients to plan, build, and ship digital products. The company's main offerings are Web Development and Mobile App Development. Woopa employs 2 - 9 people. Typical hourly rates run around $25 - $49/hr, with an average project cost near $5,000,000. This profile is a starting point — reach out to Woopa directly to discuss project specifics.
Details
| Founded: | 2011 |
|---|---|
| Hourly Rates: | $100 - $149 |
| Employees: | 10 - 49 |
| Avg. Project Cost: | $2,500,000+ |
| Ratings: |
4.4
6 Reviews
|
Dogtown Media is a technology company founded in 2011. Their core services include Mobile App Development. The company operates with a team of 10 - 49 professionals. Typical hourly rates run around $100 - $149/hr, with an average project cost near $50,000. This gives a quick snapshot of what to expect when working with Dogtown Media.
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The gap usually shows up after the contract is signed, not before. A merely competent App Development company in Seattle 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.
Seattle turns out a steady stream of engineering talent each year, and the stronger App Development companies in the region have built real depth across current frameworks, cloud infrastructure, and mobile platforms rather than relying on a handful of senior people. For larger projects, ask specifically how a firm staffs beyond its founding team — that answer tells you whether their bench is genuinely deep or whether growth would strain it.
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 Seattle has its own norms around each. None of this is a problem as long as expectations are set early; the App Development engagements that go smoothly in Seattle 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.
Rates for App Development developers in Seattle spread out quite a bit depending on seniority — junior developers sit at one end, senior engineers and architects at the other, with company size and specialization shifting things further. What tends to hold across the board is that App Development developers in Seattle come in noticeably cheaper than comparable talent in the US or Western Europe, without a proportional drop in the quality of work.
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 App Development firm in Seattle responds to reviews at all, since that habit tends to mirror how they handle feedback during an actual project.
App Development companies in Seattle that take this seriously build with SEO baked into the architecture from day one — clean URL structures, fast load times, mobile-first layouts, and proper schema markup — rather than bolting it on after launch. A App Development firm in Seattle that treats search performance as an engineering responsibility, not a marketing afterthought, tends to produce sites that actually rank.
Most experienced App Development companies in Seattle have done this kind of integration many times over — Salesforce, HubSpot, Zoho, and similar platforms are common enough that it's rarely a novel problem. What matters more is giving your App Development partner in Seattle a full, honest picture of your current stack upfront, so the integration is built cleanly instead of patched together after the fact.
The highest-rated App Development companies in Seattle 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 App Development company in Seattle will be a good fit than a number alone.
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