While 1,400 new firms were founded in 2014, approximately 850 were founded in 2019 and only about 520 in 2020, the Israel Innovation Authority (IIA) said in a report.

The swift growth of Israel's high-tech sector a decade ago earned it the monicker "start-up nation".

But as young companies have matured and in many cases thrived, the drive to go out on a limb and launch new start-ups has diminished, the IIA report found.

"The number of new start-ups established in the last two years is similar to the levels recorded in Israel a decade ago, despite the subsequent growth and development of the local innovation ecosystem," the report said.

"This decline raises the question as to whether Israel is at the end of the start-up nation era," it warned.

Israel's technology sector employs 10 percent of the country's workforce, but accounts for 15 percent of the country's gross domestic product, generates 25 percent of its income tax and constitutes 43 percent of its exports, according to IAA figures.

In an inaugural speech on Sunday after his "change" coalition won a confidence vote in parliament, Prime Minister Naftali Bennett said he would aim to increase the sector's share of the workforce to 15 percent by 2026.

Before entering full-time politics, Bennett made his fortune by founding and subsequently selling a technology start-up.

Last week, the Start-Up Nation Central NGO said that investments in Israeli technology companies reached an all-time high of $10.5 billion in the first five months of 2021, a 137 percent growth that reflected a "maturing ecosystem".

But "seed" investment in new companies was dropping, the IIA report said.

According to the agency, the rise in salaries in the high-tech sector "creates an incentive for employees to continue working in senior managerial roles rather than taking a risk in the world of entrepreneurship".

The recent mushrooming of international development centres offers another path for talented Israelis to secure incomes higher than those on offer in the local high-tech sector, the report said.

IIA head Ami Appelbaum called on the state to "develop a robust response" to the decline in new start-ups, pointing to a number of proposed legislative changes and government incentives to that end.

"The influence of high-tech on the resilience of the Israeli economy requires the country to ensure the continued prosperity of the high-tech sector," he said.

"Shocks in the Israeli high-tech ecosystem could critically affect employment, tax revenue and the stability of the Israeli economy as a whole."