Our analysts identified the top outsourcing software development companies in California providing cutting-edge services that answer key business problems, from building technical software, designing websites or mobile apps to integrating operating systems and more. Narrow down your search by team size, budget, reviews and more to select the best developer for your company’s needs.
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

Sketch Development Services
VerifiedVerified by the DesignRush team for authenticity and credibility.Build it. Run it. Own it.
Sketch delivers AI-enabled custom software and DevOps via a subscription model with two-week delivery cycles, citing zero missed deadlines. Its team serves Fortune 500 clients and is best suited for product teams needing a transparent, agile dev partner without long-term contracts...
Top Services:
- Software Development
- Cloud Consulting
- UI/UX Design
- eCommerce Development
- DevOps Consulting
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- Location
- San Francisco, California
- Number of Employees
- Under 49
- Minimal Budget
- $50,000 & Up
- Portfolios Count
- 8 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsSketch Development Services Services
Data sourced from the agency's DesignRush profileU.S. Bank Centene Corporation Maritz Change Healthcare Stifel Reinsurance Group of America (RGA) bioMerieux CareSource CENTEGIX Purina
Sketch Development Services Reviews & Testimonials
Monica's Review Sourced from Google
Amazing and talented people. I’ve worked for both client and agency side and can can say their partnership is amazing. They truly care about ongoing operations and not just ending it at a project level. Highly recommend! Message me if you want specifics.
John Andesilich's Review Sourced from Google
I own a marketing firm in Troy MO and I recently met with Calvin at Sketch Development Services to discuss a software development project I have been thinking about pursuing. He was very nice, easy to speak to and even though his field is a bit out of my knowledge base, he was able to explain things in a way that made perfect sense. I look forward to working with him and his team in the future and recommend anyone looking for a software or app development company to give them a try.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsSucceed Without (L) imitations
Softermii (https://www.softermii.com/) is an outsourcing/outstaffing company with more than 8 years of experience in web and mobile application development with a team of more than 120 specialists from 6 countries...
Top Services:
- Mobile App Development
- Web Development
- Software Development
- UI/UX Design
- Blockchain
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- Location
- Los Angeles, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $45/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 22 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsSoftermii Services
Data sourced from the agency's DesignRush profileDollar Shave Club Hollar JibJab Vidme HIPAA Video Onradpad DogVacay Cococure DronBase Rently
Softermii Reviews & Testimonials

Web Development Review from Kwesi Peyna
Luciid expresses satisfaction with Softermii's comprehensive capabilities and acknowledges that it excels in all departments necessary for successful project completion. Softermii demonstrates a well-planned process to adhere to deadlines and budgets, delivering a robust project management experience. Luciid also commends Softermii's adeptness in incorporating all necessary elements into the project (Verified via email).

Mobile App Development Review from Undisclosed
Softermii impressed us with its willingness and flexibility to work with our internal processes and employees. Through its knowledge and technical expertise, the Softermii team delivered a final product according to specifications. Softermii followed an agile methodology and showcased tremendous flexibility and dedication in ensuring a seamless customer experience. Its team also listened to the instructions well.

Web Development Review from Undisclosed
Softermii was truly dedicated and committed to the project. We recorded 1,296,000 in-app transactions and connected 3,000 properties to the platform two months after launching the app. Also, we gained around 24,000 subscribers. Softermii was committed to the project with its seamless workflow, support, and professional resources.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsEngineering peace of mind
Vention builds custom software across fintech, healthtech, and eCommerce, for clients like ClassPass, Mount Sinai, and Slice. Its ISO 27001-certified team serves 30+ industries and over 500 clients. With 20+ years of experience, the software development firm is best for businesses needing scalable...
Top Services:
- Software Development
- Staff Augmentation
- Mobile App Development
- Software Testing
- Web Development
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- Location
- San Francisco, California
- Number of Employees
- 1000 & Up
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 15 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsVention Services
Data sourced from the agency's DesignRush profileIBM PayPal Cuvva Costa Coffee Memrise Urban Tailored Dog Food Delivery RealVNC Label on a Cable ClassPass
Vention Reviews & Testimonials

Mobile App Development Review from Lee Tupper
Vention has delivered excellent design prototypes and accurate time estimates. The app is still in beta mode, and the partnership with [...] Vention will [continue] until the release of the next version. Vention is a reliable team that offers quality service. (Verified via email)

Staff Augmentation Review from Jon Wade
Vention’s efforts allowed the successful development of the product, resulting in new customers. They provided backend developers, business analysts, UI designers, and QA testers to develop our solution. Vention cultivated a seamless partnership through constant updates and a collaborative approach. Overall, their team’s well-rounded expertise was impressive.

Web Development Review from AJ Canty
We’ve been working with Vention for quite some time and consider them an extension of our team, rather than an offshore vendor. We needed solid mobile developers to work with our in-house engineers to build our Primer SDKs on both mobile platforms. This was not a trivial thing as it required a lot of cross-functional communication, but the Vention team was up to the challenge. They quickly adopted the best practices we follow at Primer and proved to be effective and proactive.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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