The tech sector is under pressure on Wednesday after a selloff on the Nasdaq index overnight.

While this is disappointing, it may have created a buying opportunity for investors. But which ASX tech shares could be buys in January?

Here are three that analysts are tipping as buys:

Gentrack Group Ltd (ASX: GTK)

The first ASX tech share that could be a buy in January according to analysts is Gentrack. Bell Potter has a buy rating and $13.90 price target on its shares.

Gentrack is a software company that provides billing, CRM, and utilities software. The latter includes departure boards in airports.

Bell Potter believes that the company is well-placed to deliver strong growth in the coming years, which it feels justifies a premium valuation. It said:

GTK has a track record of upgrading and beating guidance, with the interim result in May likely to be the next catalyst potentially from lumpy, large contract wins in Southeast Asia. GTK appears expensive at ~90x/~56x FY25e/26e P/E however the valuation reflects high earnings leverage emerging, noting PEG ratios of ~1.2x and ~0.9x respectively.

WiseTech Global Ltd (ASX: WTC)

Bell Potter thinks that WiseTech Global could be an ASX tech share to buy now. It has a buy rating and $140.00 price target on its shares.

WiseTech Global is a leading global provider of software solutions to the logistics services industry. Its CargoWise One platform is a market leading solution that is used by many of the largest logistics providers in the world. Commenting on its buy rating, the broker said:

WTC has a high degree of recurring revenue (80-85%) and should continue to grow its revenue/earnings from further customer wins. We see CargoWise as the market leader in freight forwarding software and expect growth to accelerate due to the launch of three new products, as well as ongoing global roll-out wins. All up, WTC is a growth story with strategic acquisitions representing upside potential enabling WTC to benefit from large-scale global rollouts and consolidation within the logistics sector.

Xero Ltd (ASX: XRO)

Goldman Sachs thinks that cloud accounting platform provider Xero could be an ASX tech share to buy. It has a buy rating and $201.00 price target on its shares.

The broker believes there's still significant growth ahead for the company. For example, it estimates that Xero has a total addressable market of 100 million+ small businesses, which compares to its current subscriber base of 4.2 million. It commented:

We see Xero as very well-placed to take advantage of the digitisation of SMBs globally, driven by compelling efficiency benefits and regulatory tailwinds, with >100mn SMBs worldwide representing a >NZ$100bn TAM. Given the company's pivot to profitable growth and corresponding faster earnings ramp, we see an attractive entry point into a global growth story with Xero our preferred large-cap technology name in ANZ – the stock is Buy rated.